/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/*
 * Copyright (C) 2001 Havoc Pennington, Anders Carlsson
 * Copyright (C) 2002, 2003 Red Hat, Inc.
 * Copyright (C) 2003 Rob Adams
 * Copyright (C) 2004-2006 Elijah Newren
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

/**
 * SECTION:window
 * @title: MetaWindow
 * @short_description: Mutter X managed windows
 */

#include <config.h>
#include "window-private.h"
#include "boxes-private.h"
#include "edge-resistance.h"
#include "util-private.h"
#include "frame.h"
#include <meta/errors.h>
#include "workspace-private.h"
#include "stack.h"
#include "keybindings-private.h"
#include "ui.h"
#include "place.h"
#include <meta/prefs.h>
#include <meta/group.h>
#include "constraints.h"
#include <meta/meta-enum-types.h>
#include "core.h"

#include <X11/Xatom.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include <meta/meta-cursor-tracker.h>
#include "meta/compositor-mutter.h"

#include "x11/window-x11.h"
#include "x11/window-props.h"
#include "x11/xprops.h"

#ifdef HAVE_WAYLAND
#include "wayland/meta-window-wayland.h"
#include "wayland/meta-wayland-surface.h"
#include "wayland/meta-wayland-private.h"
#endif

#include "backends/meta-backend-private.h"

/* Windows that unmaximize to a size bigger than that fraction of the workarea
 * will be scaled down to that size (while maintaining aspect ratio).
 * Windows that cover an area greater then this size are automaximized on map.
 */
#define MAX_UNMAXIMIZED_WINDOW_AREA .8

static int destroying_windows_disallowed = 0;

/* Each window has a "stamp" which is a non-recycled 64-bit ID. They
 * start after the end of the XID space so that, for stacking
 * we can keep a guint64 that represents one or the other
 */
static guint64 next_window_stamp = G_GUINT64_CONSTANT(0x100000000);

static void     invalidate_work_areas     (MetaWindow     *window);
static void     set_wm_state              (MetaWindow     *window);
static void     set_net_wm_state          (MetaWindow     *window);
static void     meta_window_set_above     (MetaWindow     *window,
                                           gboolean        new_value);

static void     meta_window_force_placement (MetaWindow     *window);

static void     meta_window_show          (MetaWindow     *window);
static void     meta_window_hide          (MetaWindow     *window);

static void     meta_window_save_rect         (MetaWindow    *window);

static void     ensure_mru_position_after (MetaWindow *window,
                                           MetaWindow *after_this_one);

static void meta_window_move_resize_now (MetaWindow  *window);

static void meta_window_unqueue (MetaWindow *window, guint queuebits);

static void     update_move           (MetaWindow   *window,
                                       gboolean      snap,
                                       int           x,
                                       int           y);
static gboolean update_move_timeout   (gpointer data);
static void     update_resize         (MetaWindow   *window,
                                       gboolean      snap,
                                       int           x,
                                       int           y,
                                       gboolean      force);
static gboolean update_resize_timeout (gpointer data);
static gboolean should_be_on_all_workspaces (MetaWindow *window);

static void meta_window_flush_calc_showing   (MetaWindow *window);

static gboolean queue_calc_showing_func (MetaWindow *window,
                                         void       *data);

static void meta_window_move_between_rects (MetaWindow          *window,
                                            const MetaRectangle *old_area,
                                            const MetaRectangle *new_area);

static void unmaximize_window_before_freeing (MetaWindow        *window);
static void unminimize_window_and_all_transient_parents (MetaWindow *window);

static void meta_window_propagate_focus_appearance (MetaWindow *window,
                                                    gboolean    focused);
static void meta_window_update_icon_now (MetaWindow *window,
                                         gboolean    force);

static void set_workspace_state (MetaWindow    *window,
                                 gboolean       on_all_workspaces,
                                 MetaWorkspace *workspace);

/* Idle handlers for the three queues (run with meta_later_add()). The
 * "data" parameter in each case will be a GINT_TO_POINTER of the
 * index into the queue arrays to use.
 *
 * TODO: Possibly there is still some code duplication among these, which we
 * need to sort out at some point.
 */
static gboolean idle_calc_showing (gpointer data);
static gboolean idle_move_resize (gpointer data);
static gboolean idle_update_icon (gpointer data);

G_DEFINE_ABSTRACT_TYPE (MetaWindow, meta_window, G_TYPE_OBJECT);

enum {
  PROP_0,

  PROP_TITLE,
  PROP_ICON,
  PROP_MINI_ICON,
  PROP_DECORATED,
  PROP_FULLSCREEN,
  PROP_MAXIMIZED_HORIZONTALLY,
  PROP_MAXIMIZED_VERTICALLY,
  PROP_MINIMIZED,
  PROP_WINDOW_TYPE,
  PROP_USER_TIME,
  PROP_DEMANDS_ATTENTION,
  PROP_URGENT,
  PROP_SKIP_TASKBAR,
  PROP_MUTTER_HINTS,
  PROP_APPEARS_FOCUSED,
  PROP_RESIZEABLE,
  PROP_ABOVE,
  PROP_WM_CLASS,
  PROP_GTK_APPLICATION_ID,
  PROP_GTK_UNIQUE_BUS_NAME,
  PROP_GTK_APPLICATION_OBJECT_PATH,
  PROP_GTK_WINDOW_OBJECT_PATH,
  PROP_GTK_APP_MENU_OBJECT_PATH,
  PROP_GTK_MENUBAR_OBJECT_PATH,
  PROP_ON_ALL_WORKSPACES,
  PROP_FLATPAK_APPID,

  LAST_PROP,
};

static GParamSpec *obj_props[LAST_PROP];

enum
{
  WORKSPACE_CHANGED,
  FOCUS,
  RAISED,
  UNMANAGED,
  SIZE_CHANGED,
  POSITION_CHANGED,

  LAST_SIGNAL
};

static guint window_signals[LAST_SIGNAL] = { 0 };

static void
prefs_changed_callback (MetaPreference pref,
                        gpointer       data)
{
  MetaWindow *window = data;

  if (pref == META_PREF_WORKSPACES_ONLY_ON_PRIMARY)
    {
      meta_window_on_all_workspaces_changed (window);
    }
  else if (pref == META_PREF_ATTACH_MODAL_DIALOGS &&
           window->type == META_WINDOW_MODAL_DIALOG)
    {
      window->attached = meta_window_should_attach_to_parent (window);
      meta_window_recalc_features (window);
      meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
    }
}

static void
meta_window_real_grab_op_began (MetaWindow *window,
                                MetaGrabOp  op)
{
}

static void
meta_window_real_grab_op_ended (MetaWindow *window,
                                MetaGrabOp  op)
{
  window->shaken_loose = FALSE;
}

static void
meta_window_real_current_workspace_changed (MetaWindow *window)
{
}

static gboolean
meta_window_real_update_struts (MetaWindow *window)
{
  return FALSE;
}

static void
meta_window_real_get_default_skip_hints (MetaWindow *window,
                                         gboolean   *skip_taskbar_out,
                                         gboolean   *skip_pager_out)
{
  *skip_taskbar_out = FALSE;
  *skip_pager_out = FALSE;
}

static gboolean
meta_window_real_update_icon (MetaWindow       *window,
                              cairo_surface_t **icon,
                              cairo_surface_t **mini_icon)
{
  *icon = NULL;
  *mini_icon = NULL;
  return FALSE;
}

static void
meta_window_finalize (GObject *object)
{
  MetaWindow *window = META_WINDOW (object);

  if (window->icon)
    cairo_surface_destroy (window->icon);

  if (window->mini_icon)
    cairo_surface_destroy (window->mini_icon);

  if (window->frame_bounds)
    cairo_region_destroy (window->frame_bounds);

  if (window->shape_region)
    cairo_region_destroy (window->shape_region);

  if (window->opaque_region)
    cairo_region_destroy (window->opaque_region);

  if (window->input_region)
    cairo_region_destroy (window->input_region);

  if (window->deepin_blur_region)
    cairo_region_destroy (window->deepin_blur_region);

  if (window->deepin_blur_mask) 
      cairo_surface_destroy (window->deepin_blur_mask);

  if (window->deepin_blur_radiuses) 
      g_array_unref (window->deepin_blur_radiuses);

  if (window->transient_for)
    g_object_unref (window->transient_for);

  g_free (window->sm_client_id);
  g_free (window->wm_client_machine);
  g_free (window->startup_id);
  g_free (window->role);
  g_free (window->res_class);
  g_free (window->res_name);
  g_free (window->title);
  g_free (window->desc);
  g_free (window->gtk_theme_variant);
  g_free (window->gtk_application_id);
  g_free (window->gtk_unique_bus_name);
  g_free (window->gtk_application_object_path);
  g_free (window->gtk_window_object_path);
  g_free (window->gtk_app_menu_object_path);
  g_free (window->gtk_menubar_object_path);
  g_free (window->flatpak_appid);

  G_OBJECT_CLASS (meta_window_parent_class)->finalize (object);
}

static void
meta_window_get_property(GObject         *object,
                         guint            prop_id,
                         GValue          *value,
                         GParamSpec      *pspec)
{
  MetaWindow *win = META_WINDOW (object);

  switch (prop_id)
    {
    case PROP_TITLE:
      g_value_set_string (value, win->title);
      break;
    case PROP_ICON:
      g_value_set_pointer (value, win->icon);
      break;
    case PROP_MINI_ICON:
      g_value_set_pointer (value, win->mini_icon);
      break;
    case PROP_DECORATED:
      g_value_set_boolean (value, win->decorated);
      break;
    case PROP_FULLSCREEN:
      g_value_set_boolean (value, win->fullscreen);
      break;
    case PROP_MAXIMIZED_HORIZONTALLY:
      g_value_set_boolean (value, win->maximized_horizontally);
      break;
    case PROP_MAXIMIZED_VERTICALLY:
      g_value_set_boolean (value, win->maximized_vertically);
      break;
    case PROP_MINIMIZED:
      g_value_set_boolean (value, win->minimized);
      break;
    case PROP_WINDOW_TYPE:
      g_value_set_enum (value, win->type);
      break;
    case PROP_USER_TIME:
      g_value_set_uint (value, win->net_wm_user_time);
      break;
    case PROP_DEMANDS_ATTENTION:
      g_value_set_boolean (value, win->wm_state_demands_attention);
      break;
    case PROP_URGENT:
      g_value_set_boolean (value, win->urgent);
      break;
    case PROP_SKIP_TASKBAR:
      g_value_set_boolean (value, win->skip_taskbar);
      break;
    case PROP_MUTTER_HINTS:
      g_value_set_string (value, win->mutter_hints);
      break;
    case PROP_APPEARS_FOCUSED:
      g_value_set_boolean (value, meta_window_appears_focused (win));
      break;
    case PROP_WM_CLASS:
      g_value_set_string (value, win->res_class);
      break;
    case PROP_RESIZEABLE:
      g_value_set_boolean (value, win->has_resize_func);
      break;
    case PROP_ABOVE:
      g_value_set_boolean (value, win->wm_state_above);
      break;
    case PROP_GTK_APPLICATION_ID:
      g_value_set_string (value, win->gtk_application_id);
      break;
    case PROP_GTK_UNIQUE_BUS_NAME:
      g_value_set_string (value, win->gtk_unique_bus_name);
      break;
    case PROP_GTK_APPLICATION_OBJECT_PATH:
      g_value_set_string (value, win->gtk_application_object_path);
      break;
    case PROP_GTK_WINDOW_OBJECT_PATH:
      g_value_set_string (value, win->gtk_window_object_path);
      break;
    case PROP_GTK_APP_MENU_OBJECT_PATH:
      g_value_set_string (value, win->gtk_app_menu_object_path);
      break;
    case PROP_GTK_MENUBAR_OBJECT_PATH:
      g_value_set_string (value, win->gtk_menubar_object_path);
      break;
    case PROP_ON_ALL_WORKSPACES:
      g_value_set_boolean (value, win->on_all_workspaces);
      break;
    case PROP_FLATPAK_APPID:
      g_value_set_string (value, win->flatpak_appid);
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
meta_window_set_property(GObject         *object,
                         guint            prop_id,
                         const GValue    *value,
                         GParamSpec      *pspec)
{
  switch (prop_id)
    {
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
meta_window_class_init (MetaWindowClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->finalize = meta_window_finalize;

  object_class->get_property = meta_window_get_property;
  object_class->set_property = meta_window_set_property;

  klass->grab_op_began = meta_window_real_grab_op_began;
  klass->grab_op_ended = meta_window_real_grab_op_ended;
  klass->current_workspace_changed = meta_window_real_current_workspace_changed;
  klass->update_struts = meta_window_real_update_struts;
  klass->get_default_skip_hints = meta_window_real_get_default_skip_hints;
  klass->update_icon = meta_window_real_update_icon;

  obj_props[PROP_TITLE] =
    g_param_spec_string ("title",
                         "Title",
                         "The title of the window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_ICON] =
    g_param_spec_pointer ("icon",
                          "Icon",
                          "96 pixel sized icon",
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_MINI_ICON] =
    g_param_spec_pointer ("mini-icon",
                          "Mini Icon",
                          "16 pixel sized icon",
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_DECORATED] =
    g_param_spec_boolean ("decorated",
                          "Decorated",
                          "Whether window is decorated",
                          TRUE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_FULLSCREEN] =
    g_param_spec_boolean ("fullscreen",
                          "Fullscreen",
                          "Whether window is fullscreened",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_MAXIMIZED_HORIZONTALLY] =
    g_param_spec_boolean ("maximized-horizontally",
                          "Maximized horizontally",
                          "Whether window is maximized horizontally",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_MAXIMIZED_VERTICALLY] =
    g_param_spec_boolean ("maximized-vertically",
                          "Maximizing vertically",
                          "Whether window is maximized vertically",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_MINIMIZED] =
    g_param_spec_boolean ("minimized",
                          "Minimizing",
                          "Whether window is minimized",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_WINDOW_TYPE] =
    g_param_spec_enum ("window-type",
                       "Window Type",
                       "The type of the window",
                       META_TYPE_WINDOW_TYPE,
                       META_WINDOW_NORMAL,
                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_USER_TIME] =
    g_param_spec_uint ("user-time",
                       "User time",
                       "Timestamp of last user interaction",
                       0,
                       G_MAXUINT,
                       0,
                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_DEMANDS_ATTENTION] =
    g_param_spec_boolean ("demands-attention",
                          "Demands Attention",
                          "Whether the window has _NET_WM_STATE_DEMANDS_ATTENTION set",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_URGENT] =
    g_param_spec_boolean ("urgent",
                          "Urgent",
                          "Whether the urgent flag of WM_HINTS is set",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_SKIP_TASKBAR] =
    g_param_spec_boolean ("skip-taskbar",
                          "Skip taskbar",
                          "Whether the skip-taskbar flag of WM_HINTS is set",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_MUTTER_HINTS] =
    g_param_spec_string ("mutter-hints",
                         "_MUTTER_HINTS",
                         "Contents of the _MUTTER_HINTS property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_APPEARS_FOCUSED] =
    g_param_spec_boolean ("appears-focused",
                          "Appears focused",
                          "Whether the window is drawn as being focused",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_RESIZEABLE] =
    g_param_spec_boolean ("resizeable",
                          "Resizeable",
                          "Whether the window can be resized",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_ABOVE] =
    g_param_spec_boolean ("above",
                          "Above",
                          "Whether the window is shown as always-on-top",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_WM_CLASS] =
    g_param_spec_string ("wm-class",
                         "WM_CLASS",
                         "Contents of the WM_CLASS property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_APPLICATION_ID] =
    g_param_spec_string ("gtk-application-id",
                         "_GTK_APPLICATION_ID",
                         "Contents of the _GTK_APPLICATION_ID property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_UNIQUE_BUS_NAME] =
    g_param_spec_string ("gtk-unique-bus-name",
                         "_GTK_UNIQUE_BUS_NAME",
                         "Contents of the _GTK_UNIQUE_BUS_NAME property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_APPLICATION_OBJECT_PATH] =
    g_param_spec_string ("gtk-application-object-path",
                         "_GTK_APPLICATION_OBJECT_PATH",
                         "Contents of the _GTK_APPLICATION_OBJECT_PATH property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_WINDOW_OBJECT_PATH] =
    g_param_spec_string ("gtk-window-object-path",
                         "_GTK_WINDOW_OBJECT_PATH",
                         "Contents of the _GTK_WINDOW_OBJECT_PATH property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_APP_MENU_OBJECT_PATH] =
    g_param_spec_string ("gtk-app-menu-object-path",
                         "_GTK_APP_MENU_OBJECT_PATH",
                         "Contents of the _GTK_APP_MENU_OBJECT_PATH property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_GTK_MENUBAR_OBJECT_PATH] =
    g_param_spec_string ("gtk-menubar-object-path",
                         "_GTK_MENUBAR_OBJECT_PATH",
                         "Contents of the _GTK_MENUBAR_OBJECT_PATH property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_ON_ALL_WORKSPACES] =
    g_param_spec_boolean ("on-all-workspaces",
                          "On all workspaces",
                          "Whether the window is set to appear on all workspaces",
                          FALSE,
                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
  obj_props[PROP_FLATPAK_APPID] =
    g_param_spec_string ("flatpak-appid",
                         "FLATPAK_APPID",
                         "Contents of the FLATPAK_APPID property of this window",
                         NULL,
                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);

  g_object_class_install_properties (object_class, LAST_PROP, obj_props);

  window_signals[WORKSPACE_CHANGED] =
    g_signal_new ("workspace-changed",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  window_signals[FOCUS] =
    g_signal_new ("focus",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  window_signals[RAISED] =
    g_signal_new ("raised",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  window_signals[UNMANAGED] =
    g_signal_new ("unmanaged",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  /**
   * MetaWindow::position-changed:
   * @window: a #MetaWindow
   *
   * This is emitted when the position of a window might
   * have changed. Specifically, this is emitted when the
   * position of the toplevel window has changed, or when
   * the position of the client window has changed.
   */
  window_signals[POSITION_CHANGED] =
    g_signal_new ("position-changed",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);

  /**
   * MetaWindow::size-changed:
   * @window: a #MetaWindow
   *
   * This is emitted when the position of a window might
   * have changed. Specifically, this is emitted when the
   * size of the toplevel window has changed, or when the
   * size of the client window has changed.
   */
  window_signals[SIZE_CHANGED] =
    g_signal_new ("size-changed",
                  G_TYPE_FROM_CLASS (object_class),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL, NULL,
                  G_TYPE_NONE, 0);
}

static void
meta_window_init (MetaWindow *self)
{
  self->stamp = next_window_stamp++;
  meta_prefs_add_listener (prefs_changed_callback, self);
}

static gboolean
is_desktop_or_dock_foreach (MetaWindow *window,
                            void       *data)
{
  gboolean *result = data;

  *result =
    window->type == META_WINDOW_DESKTOP ||
    window->type == META_WINDOW_DOCK;
  if (*result)
    return FALSE; /* stop as soon as we find one */
  else
    return TRUE;
}

/* window is the window that's newly mapped provoking
 * the possible change
 */
static void
maybe_leave_show_desktop_mode (MetaWindow *window)
{
  gboolean is_desktop_or_dock;

  if (!window->screen->active_workspace->showing_desktop)
    return;

  /* If the window is a transient for the dock or desktop, don't
   * leave show desktop mode when the window opens. That's
   * so you can e.g. hide all windows, manipulate a file on
   * the desktop via a dialog, then unshow windows again.
   */
  is_desktop_or_dock = FALSE;
  is_desktop_or_dock_foreach (window,
                              &is_desktop_or_dock);

  meta_window_foreach_ancestor (window, is_desktop_or_dock_foreach,
                                &is_desktop_or_dock);

  if (!is_desktop_or_dock)
    {
      meta_screen_minimize_all_on_active_workspace_except (window->screen,
                                                           window);
      meta_screen_unshow_desktop (window->screen);
    }
}

gboolean
meta_window_should_attach_to_parent (MetaWindow *window)
{
  MetaWindow *parent;

  if (!meta_prefs_get_attach_modal_dialogs () ||
      window->type != META_WINDOW_MODAL_DIALOG)
    return FALSE;

  parent = meta_window_get_transient_for (window);
  if (!parent)
    return FALSE;

  switch (parent->type)
    {
    case META_WINDOW_NORMAL:
    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      return TRUE;

    default:
      return FALSE;
    }
}

static gboolean
client_window_should_be_mapped (MetaWindow *window)
{
#ifdef HAVE_WAYLAND
  if (window->client_type == META_WINDOW_CLIENT_TYPE_WAYLAND &&
      !meta_wayland_surface_get_buffer (window->surface))
    return FALSE;
#endif

  return !window->shaded;
}

static void
sync_client_window_mapped (MetaWindow *window)
{
  gboolean should_be_mapped = client_window_should_be_mapped (window);

  g_return_if_fail (!window->override_redirect);

  if (window->mapped == should_be_mapped)
    return;

  window->mapped = should_be_mapped;

  meta_error_trap_push (window->display);
  if (should_be_mapped)
    {
      XMapWindow (window->display->xdisplay, window->xwindow);
    }
  else
    {
      XUnmapWindow (window->display->xdisplay, window->xwindow);
      window->unmaps_pending ++;
    }
  meta_error_trap_pop (window->display);
}

static void
meta_window_update_desc (MetaWindow *window)
{
  g_autofree gchar *title = NULL;

  g_clear_pointer (&window->desc, g_free);

  if (window->title)
    title = g_utf8_substring (window->title, 0,
                              MIN (10, g_utf8_strlen (window->title, -1)));

  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    {
      if (title)
        window->desc = g_strdup_printf ("0x%lx (%s)", window->xwindow, title);
      else
        window->desc = g_strdup_printf ("0x%lx", window->xwindow);
    }
  else
    {
      guint64 small_stamp = window->stamp - G_GUINT64_CONSTANT(0x100000000);

      if (title)
        window->desc = g_strdup_printf ("W%" G_GUINT64_FORMAT " (%s)", small_stamp, title);
      else
        window->desc = g_strdup_printf ("W%" G_GUINT64_FORMAT , small_stamp);
    }
}

static void
meta_window_main_monitor_changed (MetaWindow *window,
                                  const MetaMonitorInfo *old)
{
  META_WINDOW_GET_CLASS (window)->main_monitor_changed (window, old);

  if (old)
    g_signal_emit_by_name (window->screen, "window-left-monitor",
                           old->number, window);
  if (window->monitor)
    g_signal_emit_by_name (window->screen, "window-entered-monitor",
                           window->monitor->number, window);
}

MetaWindow *
_meta_window_shared_new (MetaDisplay         *display,
                         MetaScreen          *screen,
                         MetaWindowClientType client_type,
                         MetaWaylandSurface  *surface,
                         Window               xwindow,
                         gulong               existing_wm_state,
                         MetaCompEffect       effect,
                         XWindowAttributes   *attrs)
{
  MetaWindow *window;

  g_assert (attrs != NULL);

  meta_verbose ("attrs->map_state = %d (%s)\n",
                attrs->map_state,
                (attrs->map_state == IsUnmapped) ?
                "IsUnmapped" :
                (attrs->map_state == IsViewable) ?
                "IsViewable" :
                (attrs->map_state == IsUnviewable) ?
                "IsUnviewable" :
                "(unknown)");

  if (client_type == META_WINDOW_CLIENT_TYPE_X11)
    window = g_object_new (META_TYPE_WINDOW_X11, NULL);
#ifdef HAVE_WAYLAND
  else if (client_type == META_WINDOW_CLIENT_TYPE_WAYLAND)
    window = g_object_new (META_TYPE_WINDOW_WAYLAND, NULL);
#endif
  else
    g_assert_not_reached ();

  window->constructing = TRUE;

  window->dialog_pid = -1;

  window->client_type = client_type;
  window->surface = surface;
  window->xwindow = xwindow;

  /* this is in window->screen->display, but that's too annoying to
   * type
   */
  window->display = display;
  meta_display_register_stamp (window->display, &window->stamp, window);

  window->workspace = NULL;

  window->sync_request_counter = None;
  window->sync_request_serial = 0;
  window->sync_request_timeout_id = 0;
  window->sync_request_alarm = None;

  window->screen = screen;

  meta_window_update_desc (window);

  window->override_redirect = attrs->override_redirect;
  window->deepin_override = FALSE;

  /* avoid tons of stack updates */
  meta_stack_freeze (window->screen->stack);

  window->rect.x = attrs->x;
  window->rect.y = attrs->y;
  window->rect.width = attrs->width;
  window->rect.height = attrs->height;

  /* size_hints are the "request" */
  window->size_hints.x = attrs->x;
  window->size_hints.y = attrs->y;
  window->size_hints.width = attrs->width;
  window->size_hints.height = attrs->height;
  /* initialize the remaining size_hints as if size_hints.flags were zero */
  meta_set_normal_hints (window, NULL);

  /* And this is our unmaximized size */
  window->saved_rect = window->rect;
  window->unconstrained_rect = window->rect;

  window->depth = attrs->depth;
  window->xvisual = attrs->visual;

  window->title = NULL;
  window->icon = NULL;
  window->mini_icon = NULL;

  window->frame = NULL;
  window->has_focus = FALSE;
  window->attached_focus_window = NULL;

  window->maximized_horizontally = FALSE;
  window->maximized_vertically = FALSE;
  window->maximize_horizontally_after_placement = FALSE;
  window->maximize_vertically_after_placement = FALSE;
  window->minimize_after_placement = FALSE;
  window->fullscreen = FALSE;
  window->fullscreen_monitors[0] = -1;
  window->require_fully_onscreen = TRUE;
  window->require_on_single_monitor = TRUE;
  window->require_titlebar_visible = TRUE;
  window->on_all_workspaces = FALSE;
  window->on_all_workspaces_requested = FALSE;
  window->tile_mode = META_TILE_NONE;
  window->tile_monitor_number = -1;
  window->shaded = FALSE;
  window->initially_iconic = FALSE;
  window->minimized = FALSE;
  window->tab_unminimized = FALSE;
  window->iconic = FALSE;
  window->mapped = attrs->map_state != IsUnmapped;
  window->hidden = FALSE;
  window->known_to_compositor = FALSE;
  window->visible_to_compositor = FALSE;
  window->pending_compositor_effect = effect;
  /* if already mapped, no need to worry about focus-on-first-time-showing */
  window->showing_for_first_time = !window->mapped;
  /* if already mapped we don't want to do the placement thing;
   * override-redirect windows are placed by the app */
  window->placed = ((window->mapped && !window->hidden) || window->override_redirect);
  window->denied_focus_and_not_transient = FALSE;
  window->unmanaging = FALSE;
  window->is_in_queues = 0;
  window->keys_grabbed = FALSE;
  window->grab_on_frame = FALSE;
  window->all_keys_grabbed = FALSE;
  window->withdrawn = FALSE;
  window->initial_workspace_set = FALSE;
  window->initial_timestamp_set = FALSE;
  window->net_wm_user_time_set = FALSE;
  window->user_time_window = None;
  window->take_focus = FALSE;
  window->delete_window = FALSE;
  window->can_ping = FALSE;
  window->input = TRUE;
  window->calc_placement = FALSE;
  window->shaken_loose = FALSE;
  window->have_focus_click_grab = FALSE;
  window->disable_sync = FALSE;

  window->unmaps_pending = 0;

  window->mwm_decorated = TRUE;
  window->mwm_border_only = FALSE;
  window->mwm_has_close_func = TRUE;
  window->mwm_has_minimize_func = TRUE;
  window->mwm_has_maximize_func = TRUE;
  window->mwm_has_move_func = TRUE;
  window->mwm_has_resize_func = TRUE;

  if (client_type == META_WINDOW_CLIENT_TYPE_X11)
    window->decorated = TRUE;
  else
    window->decorated = FALSE;

  window->has_close_func = TRUE;
  window->has_minimize_func = TRUE;
  window->has_maximize_func = TRUE;
  window->has_move_func = TRUE;
  window->has_resize_func = TRUE;

  window->has_shade_func = TRUE;

  window->has_fullscreen_func = TRUE;

  window->always_sticky = FALSE;

  window->skip_taskbar = FALSE;
  window->skip_pager = FALSE;
  window->wm_state_above = FALSE;
  window->wm_state_below = FALSE;
  window->wm_state_demands_attention = FALSE;

  window->res_class = NULL;
  window->res_name = NULL;
  window->role = NULL;
  window->sm_client_id = NULL;
  window->wm_client_machine = NULL;
  window->is_remote = FALSE;
  window->startup_id = NULL;
  window->flatpak_appid = NULL;

  window->net_wm_pid = -1;

  window->xtransient_for = None;
  window->xclient_leader = None;

  window->type = META_WINDOW_NORMAL;

  window->struts = NULL;

  window->layer = META_LAYER_LAST; /* invalid value */
  window->stack_position = -1;
  window->initial_workspace = 0; /* not used */
  window->initial_timestamp = 0; /* not used */

  window->compositor_private = NULL;

  window->monitor = meta_screen_calculate_monitor_for_window (window->screen,
                                                              window);
  window->preferred_output_winsys_id = window->monitor->winsys_id;

  window->tile_match = NULL;
  window->tile_counterpart = NULL;

  /* Assign this #MetaWindow a sequence number which can be used
   * for sorting.
   */
  window->stable_sequence = ++display->window_sequence_counter;

  window->opacity = 0xFF;

  if (window->override_redirect)
    {
      window->decorated = FALSE;
      window->always_sticky = TRUE;
      window->has_close_func = FALSE;
      window->has_shade_func = FALSE;
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
    }

  META_WINDOW_GET_CLASS (window)->manage (window);

  if (!window->override_redirect)
    meta_window_update_icon_now (window, TRUE);

  if (window->initially_iconic)
    {
      /* WM_HINTS said minimized */
      window->minimized = TRUE;
      meta_verbose ("Window %s asked to start out minimized\n", window->desc);
    }

  if (existing_wm_state == IconicState)
    {
      /* WM_STATE said minimized */
      window->minimized = TRUE;
      meta_verbose ("Window %s had preexisting WM_STATE = IconicState, minimizing\n",
                    window->desc);

      /* Assume window was previously placed, though perhaps it's
       * been iconic its whole life, we have no way of knowing.
       */
      window->placed = TRUE;
    }

  /* Apply any window attributes such as initial workspace
   * based on startup notification
   */
  meta_screen_apply_startup_properties (window->screen, window);

  /* Try to get a "launch timestamp" for the window.  If the window is
   * a transient, we'd like to be able to get a last-usage timestamp
   * from the parent window.  If the window has no parent, there isn't
   * much we can do...except record the current time so that any children
   * can use this time as a fallback.
   */
  if (!window->override_redirect && !window->net_wm_user_time_set) {
    /* First, maybe the app was launched with startup notification using an
     * obsolete version of the spec; use that timestamp if it exists.
     */
    if (window->initial_timestamp_set)
      /* NOTE: Do NOT toggle net_wm_user_time_set to true; this is just
       * being recorded as a fallback for potential transients
       */
      window->net_wm_user_time = window->initial_timestamp;
    else if (window->transient_for != NULL)
      meta_window_set_user_time (window, window->transient_for->net_wm_user_time);
    else
      /* NOTE: Do NOT toggle net_wm_user_time_set to true; this is just
       * being recorded as a fallback for potential transients
       */
      window->net_wm_user_time =
        meta_display_get_current_time_roundtrip (window->display);
  }

  window->attached = meta_window_should_attach_to_parent (window);
  if (window->attached)
    meta_window_recalc_features (window);

  if (window->type == META_WINDOW_DESKTOP ||
      window->type == META_WINDOW_DOCK)
    {
      /* Change the default, but don't enforce this if the user
       * focuses the dock/desktop and unsticks it using key shortcuts.
       * Need to set this before adding to the workspaces so the MRU
       * lists will be updated.
       */
      window->on_all_workspaces_requested = TRUE;
    }

  window->on_all_workspaces = should_be_on_all_workspaces (window);

  /* For the workspace, first honor hints,
   * if that fails put transients with parents,
   * otherwise put window on active space
   */

  if (window->initial_workspace_set)
    {
      gboolean on_all_workspaces = window->on_all_workspaces;
      MetaWorkspace *workspace = NULL;

      if (window->initial_workspace == (int) 0xFFFFFFFF)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Window %s is initially on all spaces\n",
                      window->desc);

	  /* need to set on_all_workspaces first so that it will be
	   * added to all the MRU lists
	   */
          window->on_all_workspaces_requested = TRUE;

          on_all_workspaces = TRUE;
        }
      else if (!on_all_workspaces)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Window %s is initially on space %d\n",
                      window->desc, window->initial_workspace);

          workspace = meta_screen_get_workspace_by_index (window->screen,
                                                          window->initial_workspace);
        }

      set_workspace_state (window, on_all_workspaces, workspace);
    }

  /* override-redirect windows are subtly different from other windows
   * with window->on_all_workspaces == TRUE. Other windows are part of
   * some workspace (so they can return to that if the flag is turned off),
   * but appear on other workspaces. override-redirect windows are part
   * of no workspace.
   */
  if (!window->override_redirect && window->workspace == NULL)
    {
      if (window->transient_for != NULL)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Putting window %s on same workspace as parent %s\n",
                      window->desc, window->transient_for->desc);

          set_workspace_state (window,
                               window->transient_for->on_all_workspaces_requested,
                               window->transient_for->workspace);
        }

      if (window->on_all_workspaces)
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Putting window %s on all workspaces\n",
                      window->desc);

          set_workspace_state (window, TRUE, NULL);
        }
      else
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Putting window %s on active workspace\n",
                      window->desc);

          set_workspace_state (window, FALSE, window->screen->active_workspace);
        }

      meta_window_update_struts (window);
    }

  meta_window_main_monitor_changed (window, NULL);

  /* Must add window to stack before doing move/resize, since the
   * window might have fullscreen size (i.e. should have been
   * fullscreen'd; acrobat is one such braindead case; it withdraws
   * and remaps its window whenever trying to become fullscreen...)
   * and thus constraints may try to auto-fullscreen it which also
   * means restacking it.
   */
  if (!window->override_redirect)
    meta_stack_add (window->screen->stack,
                    window);
  else
    window->layer = META_LAYER_OVERRIDE_REDIRECT; /* otherwise set by MetaStack */

  if (!window->override_redirect)
    {
      /* FIXME we have a tendency to set this then immediately
       * change it again.
       */
      set_wm_state (window);
      set_net_wm_state (window);
    }

  meta_compositor_add_window (screen->display->compositor, window);
  window->known_to_compositor = TRUE;

  /* Sync stack changes */
  meta_stack_thaw (window->screen->stack);

  /* Usually the we'll have queued a stack sync anyways, because we've
   * added a new frame window or restacked. But if an undecorated
   * window is mapped, already stacked in the right place, then we
   * might need to do this explicitly.
   */
  meta_stack_tracker_queue_sync_stack (window->screen->stack_tracker);

  if (!window->override_redirect)
    {
        meta_verbose ("%s: maybe_leave_show_desktop_mode\n", __func__);
      /* disable show desktop mode unless we're a desktop component */
      maybe_leave_show_desktop_mode (window);
    }

  meta_window_queue (window, META_QUEUE_CALC_SHOWING);
  /* See bug 303284; a transient of the given window can already exist, in which
   * case we think it should probably be shown.
   */
  meta_window_foreach_transient (window,
                                 queue_calc_showing_func,
                                 NULL);
  /* See bug 334899; the window may have minimized ancestors
   * which need to be shown.
   *
   * However, we shouldn't unminimize windows here when opening
   * a new display because that breaks passing _NET_WM_STATE_HIDDEN
   * between window managers when replacing them; see bug 358042.
   *
   * And we shouldn't unminimize windows if they were initially
   * iconic.
   */
  if (!window->override_redirect &&
      !display->display_opening &&
      !window->initially_iconic)
    unminimize_window_and_all_transient_parents (window);

  window->constructing = FALSE;

  meta_display_notify_window_created (display, window);

  if (window->wm_state_demands_attention)
    g_signal_emit_by_name (window->display, "window-demands-attention", window);

  return window;
}

static gboolean
detach_foreach_func (MetaWindow *window,
                     void       *data)
{
  GList **children = data;
  MetaWindow *parent;

  if (window->attached)
    {
      /* Only return the immediate children of the window being unmanaged */
      parent = meta_window_get_transient_for (window);
      if (parent->unmanaging)
        *children = g_list_prepend (*children, window);
    }

  return TRUE;
}

void
meta_window_unmanage (MetaWindow  *window,
                      guint32      timestamp)
{
  GList *tmp;

  meta_verbose ("Unmanaging %s\n", window->desc);
  window->unmanaging = TRUE;

#ifdef HAVE_WAYLAND
  /* This needs to happen for both Wayland and XWayland clients,
   * so it can't be in MetaWindowWayland. */
  if (window->surface)
    {
      meta_wayland_surface_set_window (window->surface, NULL);
      window->surface = NULL;
    }
#endif

  if (window->visible_to_compositor)
    {
      window->visible_to_compositor = FALSE;
      meta_compositor_hide_window (window->display->compositor, window,
                                   META_COMP_EFFECT_DESTROY);
    }

  meta_compositor_remove_window (window->display->compositor, window);
  window->known_to_compositor = FALSE;

  if (destroying_windows_disallowed > 0)
    meta_bug ("Tried to destroy window %s while destruction was not allowed\n",
              window->desc);

  meta_display_unregister_stamp (window->display, window->stamp);

  if (meta_prefs_get_attach_modal_dialogs ())
    {
      GList *attached_children = NULL, *iter;

      /* Detach any attached dialogs by unmapping and letting them
       * be remapped after @window is destroyed.
       */
      meta_window_foreach_transient (window,
                                     detach_foreach_func,
                                     &attached_children);
      for (iter = attached_children; iter; iter = iter->next)
        meta_window_unmanage (iter->data, timestamp);
      g_list_free (attached_children);
    }

  /* Make sure to only show window on all workspaces if requested, to
   * not confuse other window managers that may take over
   */
  if (window->screen->closing && meta_prefs_get_workspaces_only_on_primary ())
    meta_window_on_all_workspaces_changed (window);

  if (window->fullscreen)
    {
      MetaGroup *group;

      /* If the window is fullscreen, it may be forcing
       * other windows in its group to a higher layer
       */

      meta_stack_freeze (window->screen->stack);
      group = meta_window_get_group (window);
      if (group)
        meta_group_update_layers (group);
      meta_stack_thaw (window->screen->stack);
    }

  meta_display_remove_pending_pings_for_window (window->display, window);

  /* safe to do this early as group.c won't re-add to the
   * group if window->unmanaging */
  meta_window_shutdown_group (window);

  /* If we have the focus, focus some other window.
   * This is done first, so that if the unmap causes
   * an EnterNotify the EnterNotify will have final say
   * on what gets focused, maintaining sloppy focus
   * invariants.
   */
  if (meta_window_appears_focused (window))
    meta_window_propagate_focus_appearance (window, FALSE);
  if (window->has_focus)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing default window since we're unmanaging %s\n",
                  window->desc);
      meta_workspace_focus_default_window (window->screen->active_workspace, NULL, timestamp);
    }
  else
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Unmanaging window %s which doesn't currently have focus\n",
                  window->desc);
    }

  g_assert (window->display->focus_window != window);

  if (window->struts)
    {
      meta_free_gslist_and_elements (window->struts);
      window->struts = NULL;

      meta_topic (META_DEBUG_WORKAREA,
                  "Unmanaging window %s which has struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  if (window->sync_request_timeout_id)
    {
      g_source_remove (window->sync_request_timeout_id);
      window->sync_request_timeout_id = 0;
    }

  if (window->display->grab_window == window)
    meta_display_end_grab_op (window->display, timestamp);

  g_assert (window->display->grab_window != window);

  if (window->maximized_horizontally || window->maximized_vertically)
    unmaximize_window_before_freeing (window);

  meta_window_unqueue (window, META_QUEUE_CALC_SHOWING |
                               META_QUEUE_MOVE_RESIZE |
                               META_QUEUE_UPDATE_ICON);
  meta_window_free_delete_dialog (window);

  set_workspace_state (window, FALSE, NULL);

  g_assert (window->workspace == NULL);

#ifndef G_DISABLE_CHECKS
  tmp = window->screen->workspaces;
  while (tmp != NULL)
    {
      MetaWorkspace *workspace = tmp->data;

      g_assert (g_list_find (workspace->windows, window) == NULL);
      g_assert (g_list_find (workspace->mru_list, window) == NULL);

      tmp = tmp->next;
    }
#endif

  if (window->monitor)
    {
      const MetaMonitorInfo *old = window->monitor;

      window->monitor = NULL;
      meta_window_main_monitor_changed (window, old);
    }

  if (!window->override_redirect)
    meta_stack_remove (window->screen->stack, window);

  /* If an undecorated window is being withdrawn, that will change the
   * stack as presented to the compositing manager, without actually
   * changing the stacking order of X windows.
   */
  meta_stack_tracker_queue_sync_stack (window->screen->stack_tracker);

  if (window->display->autoraise_window == window)
    meta_display_remove_autoraise_callback (window->display);

  META_WINDOW_GET_CLASS (window)->unmanage (window);

  meta_prefs_remove_listener (prefs_changed_callback, window);
  meta_screen_queue_check_fullscreen (window->screen);

  g_signal_emit (window, window_signals[UNMANAGED], 0);

  g_object_unref (window);
}

static void
set_wm_state (MetaWindow *window)
{
  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    meta_window_x11_set_wm_state (window);
}

static void
set_net_wm_state (MetaWindow *window)
{
  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    meta_window_x11_set_net_wm_state (window);
}

static void
set_allowed_actions_hint (MetaWindow *window)
{
  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    meta_window_x11_set_allowed_actions_hint (window);
}

/**
 * meta_window_located_on_workspace:
 * @window: a #MetaWindow
 * @workspace: a #MetaWorkspace
 *
 * Returns: whether @window is displayed on @workspace, or whether it
 * will be displayed on all workspaces.
 */
gboolean
meta_window_located_on_workspace (MetaWindow    *window,
                                  MetaWorkspace *workspace)
{
  return (window->on_all_workspaces) || (window->workspace == workspace);
}

static gboolean
is_minimized_foreach (MetaWindow *window,
                      void       *data)
{
  gboolean *result = data;

  *result = window->minimized;
  if (*result)
    return FALSE; /* stop as soon as we find one */
  else
    return TRUE;
}

static gboolean
ancestor_is_minimized (MetaWindow *window)
{
  gboolean is_minimized;

  is_minimized = FALSE;

  meta_window_foreach_ancestor (window, is_minimized_foreach, &is_minimized);

  return is_minimized;
}

/**
 * meta_window_showing_on_its_workspace:
 * @window: A #MetaWindow
 *
 * Returns: %TRUE if window would be visible, if its workspace was current
 */
gboolean
meta_window_showing_on_its_workspace (MetaWindow *window)
{
  gboolean showing;
  gboolean is_desktop_or_dock;
  MetaWorkspace* workspace_of_window;

  showing = TRUE;

  /* 1. See if we're minimized */
  if (window->minimized)
    showing = FALSE;

  /* 2. See if we're in "show desktop" mode */
  is_desktop_or_dock = FALSE;
  is_desktop_or_dock_foreach (window,
                              &is_desktop_or_dock);

  meta_window_foreach_ancestor (window, is_desktop_or_dock_foreach,
                                &is_desktop_or_dock);

  if (window->on_all_workspaces)
    workspace_of_window = window->screen->active_workspace;
  else if (window->workspace)
    workspace_of_window = window->workspace;
  else /* This only seems to be needed for startup */
    workspace_of_window = NULL;

  if (showing &&
      workspace_of_window && workspace_of_window->showing_desktop &&
      !is_desktop_or_dock)
    {
      meta_verbose ("We're showing the desktop on the workspace(s) that window %s is on\n",
                    window->desc);
      showing = FALSE;
    }

  if (window->override_redirect) 
    {
      meta_verbose ("%s: override_redirect window, force set showing = true\n", __func__);
      showing = TRUE;
    }
  /* 3. See if an ancestor is minimized (note that
   *    ancestor's "mapped" field may not be up to date
   *    since it's being computed in this same idle queue)
   */

  if (showing)
    {
      if (ancestor_is_minimized (window))
        showing = FALSE;
    }

  return showing;
}

gboolean
meta_window_should_be_showing (MetaWindow  *window)
{
#ifdef HAVE_WAYLAND
  if (window->client_type == META_WINDOW_CLIENT_TYPE_WAYLAND &&
      !meta_wayland_surface_get_buffer (window->surface))
    return FALSE;
#endif

  /* Windows should be showing if they're located on the
   * active workspace and they're showing on their own workspace. */
  return (meta_window_located_on_workspace (window, window->screen->active_workspace) &&
          meta_window_showing_on_its_workspace (window));
}

static void
implement_showing (MetaWindow *window,
                   gboolean    showing)
{
  /* Actually show/hide the window */
  meta_verbose ("Implement showing = %d for window %s\n",
                showing, window->desc);

  if (!showing)
    {
      /* When we manage a new window, we normally delay placing it
       * until it is is first shown, but if we're previewing hidden
       * windows we might want to know where they are on the screen,
       * so we should place the window even if we're hiding it rather
       * than showing it.
       * Force placing windows only when they should be already mapped,
       * see #751887
       */
      if (!window->placed && client_window_should_be_mapped (window))
        meta_window_force_placement (window);

      meta_window_hide (window);
    }
  else
    meta_window_show (window);

  if (!window->override_redirect)
    sync_client_window_mapped (window);
}

void
meta_window_set_showing (MetaWindow *window, gboolean val)
{
    implement_showing (window, val);
}

static void
meta_window_calc_showing (MetaWindow  *window)
{
  implement_showing (window, meta_window_should_be_showing (window));
}

static guint queue_later[NUMBER_OF_QUEUES] = {0, 0, 0};
static GSList *queue_pending[NUMBER_OF_QUEUES] = {NULL, NULL, NULL};

static int
stackcmp (gconstpointer a, gconstpointer b)
{
  MetaWindow *aw = (gpointer) a;
  MetaWindow *bw = (gpointer) b;

  if (aw->screen != bw->screen)
    return 0; /* don't care how they sort with respect to each other */
  else
    return meta_stack_windows_cmp (aw->screen->stack,
                                   aw, bw);
}

static gboolean
idle_calc_showing (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  GSList *should_show;
  GSList *should_hide;
  GSList *unplaced;
  GSList *displays;
  guint queue_index = GPOINTER_TO_INT (data);

  g_return_val_if_fail (queue_pending[queue_index] != NULL, FALSE);

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Clearing the calc_showing queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue calc_showings.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  /* We map windows from top to bottom and unmap from bottom to
   * top, to avoid extra expose events. The exception is
   * for unplaced windows, which have to be mapped from bottom to
   * top so placement works.
   */
  should_show = NULL;
  should_hide = NULL;
  unplaced = NULL;
  displays = NULL;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      if (!window->placed)
        unplaced = g_slist_prepend (unplaced, window);
      else if (meta_window_should_be_showing (window))
        should_show = g_slist_prepend (should_show, window);
      else
        should_hide = g_slist_prepend (should_hide, window);

      tmp = tmp->next;
    }

  /* bottom to top */
  unplaced = g_slist_sort (unplaced, stackcmp);
  should_hide = g_slist_sort (should_hide, stackcmp);
  /* top to bottom */
  should_show = g_slist_sort (should_show, stackcmp);
  should_show = g_slist_reverse (should_show);

  tmp = unplaced;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      meta_window_calc_showing (window);

      tmp = tmp->next;
    }

  tmp = should_show;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      implement_showing (window, TRUE);

      tmp = tmp->next;
    }

  tmp = should_hide;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      implement_showing (window, FALSE);

      tmp = tmp->next;
    }

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      /* important to set this here for reentrancy -
       * if we queue a window again while it's in "copy",
       * then queue_calc_showing will just return since
       * we are still in the calc_showing queue
       */
      window->is_in_queues &= ~META_QUEUE_CALC_SHOWING;

      tmp = tmp->next;
    }

  if (meta_prefs_get_focus_mode () != G_DESKTOP_FOCUS_MODE_CLICK)
    {
      /* When display->mouse_mode is false, we want to ignore
       * EnterNotify events unless they come from mouse motion.  To do
       * that, we set a sentinel property on the root window if we're
       * not in mouse_mode.
       */
      tmp = should_show;
      while (tmp != NULL)
        {
          MetaWindow *window = tmp->data;

          if (!window->display->mouse_mode)
            meta_display_increment_focus_sentinel (window->display);

          tmp = tmp->next;
        }
    }

  g_slist_free (copy);

  g_slist_free (unplaced);
  g_slist_free (should_show);
  g_slist_free (should_hide);
  g_slist_free (displays);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

#ifdef WITH_VERBOSE_MODE
static const gchar* meta_window_queue_names[NUMBER_OF_QUEUES] =
  {"calc_showing", "move_resize", "update_icon"};
#endif

static void
meta_window_unqueue (MetaWindow *window, guint queuebits)
{
  gint queuenum;

  for (queuenum=0; queuenum<NUMBER_OF_QUEUES; queuenum++)
    {
      if ((queuebits & 1<<queuenum) /* they have asked to unqueue */
          &&
          (window->is_in_queues & 1<<queuenum)) /* it's in the queue */
        {

          meta_topic (META_DEBUG_WINDOW_STATE,
              "Removing %s from the %s queue\n",
              window->desc,
              meta_window_queue_names[queuenum]);

          /* Note that window may not actually be in the queue
           * because it may have been in "copy" inside the idle handler
           */
          queue_pending[queuenum] = g_slist_remove (queue_pending[queuenum], window);
          window->is_in_queues &= ~(1<<queuenum);

          /* Okay, so maybe we've used up all the entries in the queue.
           * In that case, we should kill the function that deals with
           * the queue, because there's nothing left for it to do.
           */
          if (queue_pending[queuenum] == NULL && queue_later[queuenum] != 0)
            {
              meta_later_remove (queue_later[queuenum]);
              queue_later[queuenum] = 0;
            }
        }
    }
}

static void
meta_window_flush_calc_showing (MetaWindow *window)
{
  if (window->is_in_queues & META_QUEUE_CALC_SHOWING)
    {
      meta_window_unqueue (window, META_QUEUE_CALC_SHOWING);
      meta_window_calc_showing (window);
    }
}

void
meta_window_queue (MetaWindow *window, guint queuebits)
{
  guint queuenum;

  /* Easier to debug by checking here rather than in the idle */
  g_return_if_fail (!window->override_redirect || (queuebits & META_QUEUE_MOVE_RESIZE) == 0);

  for (queuenum=0; queuenum<NUMBER_OF_QUEUES; queuenum++)
    {
      if (queuebits & 1<<queuenum)
        {
          /* Data which varies between queues.
           * Yes, these do look a lot like associative arrays:
           * I seem to be turning into a Perl programmer.
           */

          const MetaLaterType window_queue_later_when[NUMBER_OF_QUEUES] =
            {
              META_LATER_CALC_SHOWING, /* CALC_SHOWING */
              META_LATER_RESIZE,        /* MOVE_RESIZE */
              META_LATER_BEFORE_REDRAW  /* UPDATE_ICON */
            };

          const GSourceFunc window_queue_later_handler[NUMBER_OF_QUEUES] =
            {
              idle_calc_showing,
              idle_move_resize,
              idle_update_icon,
            };

          /* If we're about to drop the window, there's no point in putting
           * it on a queue.
           */
          if (window->unmanaging)
            break;

          /* If the window already claims to be in that queue, there's no
           * point putting it in the queue.
           */
          if (window->is_in_queues & 1<<queuenum)
            break;

          meta_topic (META_DEBUG_WINDOW_STATE,
              "Putting %s in the %s queue\n",
              window->desc,
              meta_window_queue_names[queuenum]);

          /* So, mark it as being in this queue. */
          window->is_in_queues |= 1<<queuenum;

          /* There's not a lot of point putting things into a queue if
           * nobody's on the other end pulling them out. Therefore,
           * let's check to see whether an idle handler exists to do
           * that. If not, we'll create one.
           */

          if (queue_later[queuenum] == 0)
            queue_later[queuenum] = meta_later_add
              (
                window_queue_later_when[queuenum],
                window_queue_later_handler[queuenum],
                GUINT_TO_POINTER(queuenum),
                NULL
              );

          /* And now we actually put it on the queue. */
          queue_pending[queuenum] = g_slist_prepend (queue_pending[queuenum],
                                                     window);
      }
  }
}

static gboolean
intervening_user_event_occurred (MetaWindow *window)
{
  guint32 compare;
  MetaWindow *focus_window;

  focus_window = window->display->focus_window;

  meta_topic (META_DEBUG_STARTUP,
              "COMPARISON:\n"
              "  net_wm_user_time_set : %d\n"
              "  net_wm_user_time     : %u\n"
              "  initial_timestamp_set: %d\n"
              "  initial_timestamp    : %u\n",
              window->net_wm_user_time_set,
              window->net_wm_user_time,
              window->initial_timestamp_set,
              window->initial_timestamp);
  if (focus_window != NULL)
    {
      meta_topic (META_DEBUG_STARTUP,
                  "COMPARISON (continued):\n"
                  "  focus_window             : %s\n"
                  "  fw->net_wm_user_time_set : %d\n"
                  "  fw->net_wm_user_time     : %u\n",
                  focus_window->desc,
                  focus_window->net_wm_user_time_set,
                  focus_window->net_wm_user_time);
    }

  /* We expect the most common case for not focusing a new window
   * to be when a hint to not focus it has been set.  Since we can
   * deal with that case rapidly, we use special case it--this is
   * merely a preliminary optimization.  :)
   */
  if ( ((window->net_wm_user_time_set == TRUE) &&
       (window->net_wm_user_time == 0))
      ||
       ((window->initial_timestamp_set == TRUE) &&
       (window->initial_timestamp == 0)))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "window %s explicitly requested no focus\n",
                  window->desc);
      return TRUE;
    }

  if (!(window->net_wm_user_time_set) && !(window->initial_timestamp_set))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "no information about window %s found\n",
                  window->desc);
      return FALSE;
    }

  if (focus_window != NULL &&
      !focus_window->net_wm_user_time_set)
    {
      meta_topic (META_DEBUG_STARTUP,
                  "focus window, %s, doesn't have a user time set yet!\n",
                  window->desc);
      return FALSE;
    }

  /* To determine the "launch" time of an application,
   * startup-notification can set the TIMESTAMP and the
   * application (usually via its toolkit such as gtk or qt) can
   * set the _NET_WM_USER_TIME.  If both are set, we need to be
   * using the newer of the two values.
   *
   * See http://bugzilla.gnome.org/show_bug.cgi?id=573922
   */
  compare = 0;
  if (window->net_wm_user_time_set &&
      window->initial_timestamp_set)
    compare =
      XSERVER_TIME_IS_BEFORE (window->net_wm_user_time,
                              window->initial_timestamp) ?
      window->initial_timestamp : window->net_wm_user_time;
  else if (window->net_wm_user_time_set)
    compare = window->net_wm_user_time;
  else if (window->initial_timestamp_set)
    compare = window->initial_timestamp;

  if ((focus_window != NULL) &&
      XSERVER_TIME_IS_BEFORE (compare, focus_window->net_wm_user_time))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "window %s focus prevented by other activity; %u < %u\n",
                  window->desc,
                  compare,
                  focus_window->net_wm_user_time);
      return TRUE;
    }
  else
    {
      meta_topic (META_DEBUG_STARTUP,
                  "new window %s with no intervening events\n",
                  window->desc);
      return FALSE;
    }
}

/* This function is an ugly hack.  It's experimental in nature and ought to be
 * replaced by a real hint from the app to the WM if we decide the experimental
 * behavior is worthwhile.  The basic idea is to get more feedback about how
 * usage scenarios of "strict" focus users and what they expect.  See #326159.
 */
static gboolean
window_is_terminal (MetaWindow *window)
{
  if (window == NULL || window->res_class == NULL)
    return FALSE;

  /*
   * Compare res_class, which is not user-settable, and thus theoretically
   * a more-reliable indication of term-ness.
   */

  /* gnome-terminal -- if you couldn't guess */
  if (strcmp (window->res_class, "Gnome-terminal") == 0)
    return TRUE;
  /* xterm, rxvt, aterm */
  else if (strcmp (window->res_class, "XTerm") == 0)
    return TRUE;
  /* konsole, KDE's terminal program */
  else if (strcmp (window->res_class, "Konsole") == 0)
    return TRUE;
  /* rxvt-unicode */
  else if (strcmp (window->res_class, "URxvt") == 0)
    return TRUE;
  /* eterm */
  else if (strcmp (window->res_class, "Eterm") == 0)
    return TRUE;
  /* KTerm -- some terminal not KDE based; so not like Konsole */
  else if (strcmp (window->res_class, "KTerm") == 0)
    return TRUE;
  /* Multi-gnome-terminal */
  else if (strcmp (window->res_class, "Multi-gnome-terminal") == 0)
    return TRUE;
  /* mlterm ("multi lingual terminal emulator on X") */
  else if (strcmp (window->res_class, "mlterm") == 0)
    return TRUE;
  /* Terminal -- XFCE Terminal */
  else if (strcmp (window->res_class, "Terminal") == 0)
    return TRUE;

  return FALSE;
}

/* This function determines what state the window should have assuming that it
 * and the focus_window have no relation
 */
static void
window_state_on_map (MetaWindow *window,
                     gboolean *takes_focus,
                     gboolean *places_on_top)
{
  gboolean intervening_events;

  intervening_events = intervening_user_event_occurred (window);

  *takes_focus = !intervening_events;
  *places_on_top = *takes_focus;

  /* don't initially focus windows that are intended to not accept
   * focus
   */
  if (!(window->input || window->take_focus))
    {
      *takes_focus = FALSE;
      return;
    }

  /* Terminal usage may be different; some users intend to launch
   * many apps in quick succession or to just view things in the new
   * window while still interacting with the terminal.  In that case,
   * apps launched from the terminal should not take focus.  This
   * isn't quite the same as not allowing focus to transfer from
   * terminals due to new window map, but the latter is a much easier
   * approximation to enforce so we do that.
   */
  if (*takes_focus &&
      meta_prefs_get_focus_new_windows () == G_DESKTOP_FOCUS_NEW_WINDOWS_STRICT &&
      !window->display->allow_terminal_deactivation &&
      window_is_terminal (window->display->focus_window) &&
      !meta_window_is_ancestor_of_transient (window->display->focus_window,
                                             window))
    {
      meta_topic (META_DEBUG_FOCUS,
                  "focus_window is terminal; not focusing new window.\n");
      *takes_focus = FALSE;
      *places_on_top = FALSE;
    }

  switch (window->type)
    {
    case META_WINDOW_UTILITY:
    case META_WINDOW_TOOLBAR:
      *takes_focus = FALSE;
      *places_on_top = FALSE;
      break;
    case META_WINDOW_DOCK:
    case META_WINDOW_DESKTOP:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_MENU:
    /* override redirect types: */
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      /* don't focus any of these; places_on_top may be irrelevant for some of
       * these (e.g. dock)--but you never know--the focus window might also be
       * of the same type in some weird situation...
       */
      *takes_focus = FALSE;
      break;
    case META_WINDOW_NORMAL:
    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      /* The default is correct for these */
      break;
    }
}

static gboolean
windows_overlap (const MetaWindow *w1, const MetaWindow *w2)
{
  if (w1->minimized || w1->hidden || w2->minimized || w2->hidden)
    return FALSE;

  MetaRectangle w1rect, w2rect;
  meta_window_get_frame_rect (w1, &w1rect);
  meta_window_get_frame_rect (w2, &w2rect);
  return meta_rectangle_overlap (&w1rect, &w2rect);
}

/* Returns whether a new window would be covered by any
 * existing window on the same workspace that is set
 * to be "above" ("always on top").  A window that is not
 * set "above" would be underneath the new window anyway.
 *
 * We take "covered" to mean even partially covered, but
 * some people might prefer entirely covered.  I think it
 * is more useful to behave this way if any part of the
 * window is covered, because a partial coverage could be
 * (say) ninety per cent and almost indistinguishable from total.
 */
static gboolean
window_would_be_covered (const MetaWindow *newbie)
{
  MetaWorkspace *workspace = meta_window_get_workspace ((MetaWindow *)newbie);
  GList *tmp, *windows;

  windows = meta_workspace_list_windows (workspace);

  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *w = tmp->data;

      if (w->wm_state_above && w != newbie)
        {
          /* We have found a window that is "above". Perhaps it overlaps. */
          if (windows_overlap (w, newbie))
            {
              g_list_free (windows); /* clean up... */
              return TRUE; /* yes, it does */
            }
        }

      tmp = tmp->next;
    }

  g_list_free (windows);
  return FALSE; /* none found */
}

static void
meta_window_force_placement (MetaWindow *window)
{
  if (window->placed)
    return;

  /* We have to recalc the placement here since other windows may
   * have been mapped/placed since we last did constrain_position
   */

  /* calc_placement is an efficiency hack to avoid
   * multiple placement calculations before we finally
   * show the window.
   */
  window->calc_placement = TRUE;
  meta_window_move_resize_now (window);
  window->calc_placement = FALSE;

  /* don't ever do the initial position constraint thing again.
   * This is toggled here so that initially-iconified windows
   * still get placed when they are ultimately shown.
   */
  window->placed = TRUE;

  /* Don't want to accidentally reuse the fact that we had been denied
   * focus in any future constraints unless we're denied focus again.
   */
  window->denied_focus_and_not_transient = FALSE;
}

static inline gboolean _is_wine_window(MetaWindow* window)
{
    return (window->res_class && g_ascii_strncasecmp(window->res_class, "wine", 4) == 0);
}

static void
meta_window_show (MetaWindow *window)
{
  gboolean did_show;
  gboolean takes_focus_on_map;
  gboolean place_on_top_on_map;
  gboolean needs_stacking_adjustment;
  MetaWindow *focus_window;
  gboolean will_be_covered;
  gboolean notify_demands_attention = FALSE;

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Showing window %s, shaded: %d iconic: %d placed: %d\n",
              window->desc, window->shaded, window->iconic, window->placed);

  focus_window = window->display->focus_window;  /* May be NULL! */
  did_show = FALSE;
  window_state_on_map (window, &takes_focus_on_map, &place_on_top_on_map);
  needs_stacking_adjustment = FALSE;
  will_be_covered = window_would_be_covered (window);

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Window %s %s focus on map, and %s place on top on map.\n",
              window->desc,
              takes_focus_on_map ? "does" : "does not",
              place_on_top_on_map ? "does" : "does not");

  /* Now, in some rare cases we should *not* put a new window on top.
   * These cases include certain types of windows showing for the first
   * time, and any window which would be covered because of another window
   * being set "above" ("always on top").
   *
   * FIXME: Although "place_on_top_on_map" and "takes_focus_on_map" are
   * generally based on the window type, there is a special case when the
   * focus window is a terminal for them both to be false; this should
   * probably rather be a term in the "if" condition below.
   */

  if ( focus_window != NULL && window->showing_for_first_time &&
      ( (!place_on_top_on_map && !takes_focus_on_map) ||
      will_be_covered )
    ) {
      if (meta_window_is_ancestor_of_transient (focus_window, window) &&
            !_is_wine_window(focus_window))
        {
          guint32     timestamp;

          timestamp = meta_display_get_current_time_roundtrip (window->display);

          /* This happens for error dialogs or alerts; these need to remain on
           * top, but it would be confusing to have its ancestor remain
           * focused.
           */
          meta_topic (META_DEBUG_STARTUP,
                      "The focus window %s is an ancestor of the newly mapped "
                      "window %s which isn't being focused.  Unfocusing the "
                      "ancestor.\n",
                      focus_window->desc, window->desc);

          meta_display_focus_the_no_focus_window (window->display,
                                                  window->screen,
                                                  timestamp);
        }
      else
        {
          needs_stacking_adjustment = TRUE;
          if (!window->placed)
            window->denied_focus_and_not_transient = TRUE;
        }
    }

  if (!window->placed)
    {
      if (meta_prefs_get_auto_maximize() && window->showing_for_first_time && window->has_maximize_func)
        {
          MetaRectangle work_area;
          meta_window_get_work_area_for_monitor (window, window->monitor->number, &work_area);
          /* Automaximize windows that map with a size > MAX_UNMAXIMIZED_WINDOW_AREA of the work area */
          if (window->rect.width * window->rect.height > work_area.width * work_area.height * MAX_UNMAXIMIZED_WINDOW_AREA)
            {
              window->maximize_horizontally_after_placement = TRUE;
              window->maximize_vertically_after_placement = TRUE;
            }
        }
      meta_window_force_placement (window);
    }

  if (needs_stacking_adjustment)
    {
      gboolean overlap;

      /* This window isn't getting focus on map.  We may need to do some
       * special handing with it in regards to
       *   - the stacking of the window
       *   - the MRU position of the window
       *   - the demands attention setting of the window
       *
       * Firstly, set the flag so we don't give the window focus anyway
       * and confuse people.
       */

      takes_focus_on_map = FALSE;

      overlap = windows_overlap (window, focus_window);

      /* We want alt tab to go to the denied-focus window */
      ensure_mru_position_after (window, focus_window);

      /* We don't want the denied-focus window to obscure the focus
       * window, and if we're in both click-to-focus mode and
       * raise-on-click mode then we want to maintain the invariant
       * that MRU order == stacking order.  The need for this if
       * comes from the fact that in sloppy/mouse focus the focus
       * window may not overlap other windows and also can be
       * considered "below" them; this combination means that
       * placing the denied-focus window "below" the focus window
       * in the stack when it doesn't overlap it confusingly places
       * that new window below a lot of other windows.
       */
      if (!will_be_covered && (overlap ||
          (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK &&
           meta_prefs_get_raise_on_click ())))
        meta_window_stack_just_below (window, focus_window);

      /* If the window will be obscured by the focus window, then the
       * user might not notice the window appearing so set the
       * demands attention hint.
       *
       * We set the hint ourselves rather than calling
       * meta_window_set_demands_attention() because that would cause
       * a recalculation of overlap, and a call to set_net_wm_state()
       * which we are going to call ourselves here a few lines down.
       */
      if (overlap || will_be_covered)
        {
          if (!window->wm_state_demands_attention)
            {
              window->wm_state_demands_attention = TRUE;
              notify_demands_attention = TRUE;
            }
        }
    }

  if (window->hidden)
    {
      meta_stack_freeze (window->screen->stack);
      window->hidden = FALSE;
      meta_stack_thaw (window->screen->stack);
      did_show = TRUE;
    }

  if (window->iconic)
    {
      window->iconic = FALSE;
      set_wm_state (window);
    }

  if (!window->visible_to_compositor)
    {
      MetaCompEffect effect = META_COMP_EFFECT_NONE;

      window->visible_to_compositor = TRUE;

      switch (window->pending_compositor_effect)
        {
        case META_COMP_EFFECT_CREATE:
        case META_COMP_EFFECT_UNMINIMIZE:
          effect = window->pending_compositor_effect;
          break;
        case META_COMP_EFFECT_NONE:
        case META_COMP_EFFECT_DESTROY:
        case META_COMP_EFFECT_MINIMIZE:
          break;
        }

      meta_compositor_show_window (window->display->compositor,
                                   window, effect);
      window->pending_compositor_effect = META_COMP_EFFECT_NONE;
    }

  /* We don't want to worry about all cases from inside
   * implement_showing(); we only want to worry about focus if this
   * window has not been shown before.
   */
  if (window->showing_for_first_time)
    {
      window->showing_for_first_time = FALSE;
      if (takes_focus_on_map)
        {
          guint32     timestamp;

          timestamp = meta_display_get_current_time_roundtrip (window->display);

          meta_window_focus (window, timestamp);
        }
      else
        {
          /* Prevent EnterNotify events in sloppy/mouse focus from
           * erroneously focusing the window that had been denied
           * focus.  FIXME: This introduces a race; I have a couple
           * ideas for a better way to accomplish the same thing, but
           * they're more involved so do it this way for now.
           */
          meta_display_increment_focus_sentinel (window->display);
        }
    }

  set_net_wm_state (window);

  if (did_show && window->struts)
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Mapped window %s with struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  if (did_show)
    meta_screen_queue_check_fullscreen (window->screen);

#ifdef HAVE_WAYLAND
  if (did_show && window->client_type == META_WINDOW_CLIENT_TYPE_WAYLAND)
    meta_wayland_compositor_repick (meta_wayland_compositor_get_default ());
#endif

  /*
   * Now that we have shown the window, we no longer want to consider the
   * initial timestamp in any subsequent deliberations whether to focus this
   * window or not, so clear the flag.
   *
   * See http://bugzilla.gnome.org/show_bug.cgi?id=573922
   */
  window->initial_timestamp_set = FALSE;

  if (notify_demands_attention)
    {
      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_DEMANDS_ATTENTION]);
      g_signal_emit_by_name (window->display, "window-demands-attention",
                             window);
    }
}

static void
meta_window_hide (MetaWindow *window)
{
  gboolean did_hide;

  meta_topic (META_DEBUG_WINDOW_STATE,
              "Hiding window %s\n", window->desc);

  if (window->visible_to_compositor)
    {
      MetaCompEffect effect = META_COMP_EFFECT_NONE;

      window->visible_to_compositor = FALSE;

      switch (window->pending_compositor_effect)
        {
        case META_COMP_EFFECT_CREATE:
        case META_COMP_EFFECT_UNMINIMIZE:
        case META_COMP_EFFECT_NONE:
          break;
        case META_COMP_EFFECT_DESTROY:
        case META_COMP_EFFECT_MINIMIZE:
          effect = window->pending_compositor_effect;
          break;
        }

      meta_compositor_hide_window (window->display->compositor, window, effect);
      window->pending_compositor_effect = META_COMP_EFFECT_NONE;
    }

  did_hide = FALSE;

  if (!window->hidden)
    {
      meta_stack_freeze (window->screen->stack);
      window->hidden = TRUE;
      meta_stack_thaw (window->screen->stack);

      did_hide = TRUE;
    }

  if (!window->iconic)
    {
      window->iconic = TRUE;
      set_wm_state (window);
    }

  set_net_wm_state (window);

  if (did_hide && window->struts)
    {
      meta_topic (META_DEBUG_WORKAREA,
                  "Unmapped window %s with struts, so invalidating work areas\n",
                  window->desc);
      invalidate_work_areas (window);
    }

  if (window->has_focus)
    {
      MetaWindow *not_this_one = NULL;
      MetaWorkspace *my_workspace = meta_window_get_workspace (window);
      guint32 timestamp = meta_display_get_current_time_roundtrip (window->display);

      /*
       * If this window is modal, passing the not_this_one window to
       * _focus_default_window() makes the focus to be given to this window's
       * ancestor. This can only be the case if the window is on the currently
       * active workspace; when it is not, we need to pass in NULL, so as to
       * focus the default window for the active workspace (this scenario
       * arises when we are switching workspaces).
       * We also pass in NULL if we are in the process of hiding all non-desktop
       * windows to avoid unexpected changes to the stacking order.
       */
      if (my_workspace == window->screen->active_workspace &&
          !my_workspace->showing_desktop)
        not_this_one = window;

      meta_workspace_focus_default_window (window->screen->active_workspace,
                                           not_this_one,
                                           timestamp);
    }

  if (did_hide)
    meta_screen_queue_check_fullscreen (window->screen);
}

static gboolean
queue_calc_showing_func (MetaWindow *window,
                         void       *data)
{
  meta_window_queue(window, META_QUEUE_CALC_SHOWING);
  return TRUE;
}

void
meta_window_minimize (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (!window->minimized)
    {
      window->minimized = TRUE;
      window->pending_compositor_effect = META_COMP_EFFECT_MINIMIZE;
      meta_window_queue(window, META_QUEUE_CALC_SHOWING);

      meta_window_foreach_transient (window,
                                     queue_calc_showing_func,
                                     NULL);

      if (window->has_focus)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Focusing default window due to minimization of focus window %s\n",
                      window->desc);
        }
      else
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Minimizing window %s which doesn't have the focus\n",
                      window->desc);
        }

      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MINIMIZED]);
    }
}

void
meta_window_unminimize (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (window->minimized)
    {
      window->minimized = FALSE;
      window->pending_compositor_effect = META_COMP_EFFECT_UNMINIMIZE;
      meta_window_queue(window, META_QUEUE_CALC_SHOWING);

      meta_window_foreach_transient (window,
                                     queue_calc_showing_func,
                                     NULL);

      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MINIMIZED]);
    }
}

static void
ensure_size_hints_satisfied (MetaRectangle    *rect,
                             const XSizeHints *size_hints)
{
  int minw, minh, maxw, maxh;   /* min/max width/height                      */
  int basew, baseh, winc, hinc; /* base width/height, width/height increment */
  int extra_width, extra_height;

  minw  = size_hints->min_width;  minh  = size_hints->min_height;
  maxw  = size_hints->max_width;  maxh  = size_hints->max_height;
  basew = size_hints->base_width; baseh = size_hints->base_height;
  winc  = size_hints->width_inc;  hinc  = size_hints->height_inc;

  /* First, enforce min/max size constraints */
  rect->width  = CLAMP (rect->width,  minw, maxw);
  rect->height = CLAMP (rect->height, minh, maxh);

  /* Now, verify size increment constraints are satisfied, or make them be */
  extra_width  = (rect->width  - basew) % winc;
  extra_height = (rect->height - baseh) % hinc;

  rect->width  -= extra_width;
  rect->height -= extra_height;

  /* Adjusting width/height down, as done above, may violate minimum size
   * constraints, so one last fix.
   */
  if (rect->width  < minw)
    rect->width  += ((minw - rect->width)/winc  + 1)*winc;
  if (rect->height < minh)
    rect->height += ((minh - rect->height)/hinc + 1)*hinc;
}

static void
meta_window_save_rect (MetaWindow *window)
{
  if (!(META_WINDOW_MAXIMIZED (window) || META_WINDOW_TILED_SIDE_BY_SIDE (window) || window->fullscreen))
    {
      /* save size/pos as appropriate args for move_resize */
      if (!window->maximized_horizontally)
        {
          window->saved_rect.x      = window->rect.x;
          window->saved_rect.width  = window->rect.width;
        }
      if (!window->maximized_vertically)
        {
          window->saved_rect.y      = window->rect.y;
          window->saved_rect.height = window->rect.height;
        }
    }
}

void
meta_window_maximize_internal (MetaWindow        *window,
                               MetaMaximizeFlags  directions,
                               MetaRectangle     *saved_rect)
{
  /* At least one of the two directions ought to be set */
  gboolean maximize_horizontally, maximize_vertically;
  maximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  maximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (maximize_horizontally || maximize_vertically);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Maximizing %s%s\n",
              window->desc,
              maximize_horizontally && maximize_vertically ? "" :
                maximize_horizontally ? " horizontally" :
                  maximize_vertically ? " vertically" : "BUGGGGG");

  if (saved_rect != NULL)
    window->saved_rect = *saved_rect;
  else
    meta_window_save_rect (window);

  if (maximize_horizontally && maximize_vertically)
    window->saved_maximize = TRUE;

  window->maximized_horizontally =
    window->maximized_horizontally || maximize_horizontally;
  window->maximized_vertically =
    window->maximized_vertically   || maximize_vertically;

  meta_window_recalc_features (window);
  set_net_wm_state (window);

  if (window->monitor->in_fullscreen)
    meta_screen_queue_check_fullscreen (window->screen);

  g_object_freeze_notify (G_OBJECT (window));
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MAXIMIZED_HORIZONTALLY]);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MAXIMIZED_VERTICALLY]);
  g_object_thaw_notify (G_OBJECT (window));
}

void
meta_window_maximize (MetaWindow        *window,
                      MetaMaximizeFlags  directions)
{
  MetaRectangle *saved_rect = NULL;
  gboolean maximize_horizontally, maximize_vertically;

  g_return_if_fail (!window->override_redirect);

  /* At least one of the two directions ought to be set */
  maximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  maximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (maximize_horizontally || maximize_vertically);

  /* Only do something if the window isn't already maximized in the
   * given direction(s).
   */
  if ((maximize_horizontally && !window->maximized_horizontally) ||
      (maximize_vertically   && !window->maximized_vertically))
    {
      if (window->shaded && maximize_vertically)
        {
          /* Shading sucks anyway; I'm not adding a timestamp argument
           * to this function just for this niche usage & corner case.
           */
          guint32 timestamp =
            meta_display_get_current_time_roundtrip (window->display);
          meta_window_unshade (window, timestamp);
        }

      /* if the window hasn't been placed yet, we'll maximize it then
       */
      if (!window->placed)
	{
	  window->maximize_horizontally_after_placement =
            window->maximize_horizontally_after_placement ||
            maximize_horizontally;
	  window->maximize_vertically_after_placement =
            window->maximize_vertically_after_placement ||
            maximize_vertically;
	  return;
	}

      if (window->tile_mode != META_TILE_NONE)
        {
          saved_rect = &window->saved_rect;

          window->maximized_vertically = FALSE;
          window->tile_mode = META_TILE_NONE;
          meta_window_compute_tile_counterpart (window);
        }

      meta_window_maximize_internal (window,
                                     directions,
                                     saved_rect);

      MetaRectangle old_frame_rect, old_buffer_rect, new_rect;

      meta_window_get_frame_rect (window, &old_frame_rect);
      meta_window_get_buffer_rect (window, &old_buffer_rect);

      meta_window_move_resize_internal (window,
                                        (META_MOVE_RESIZE_MOVE_ACTION |
                                         META_MOVE_RESIZE_RESIZE_ACTION |
                                         META_MOVE_RESIZE_STATE_CHANGED |
                                         META_MOVE_RESIZE_DONT_SYNC_COMPOSITOR),
                                        NorthWestGravity,
                                        window->unconstrained_rect);
      meta_window_get_frame_rect (window, &new_rect);

      meta_compositor_size_change_window (window->display->compositor, window,
                                          META_SIZE_CHANGE_MAXIMIZE,
                                          &old_frame_rect, &old_buffer_rect);
    }
}

/**
 * meta_window_get_maximized:
 * @window: a #MetaWindow
 *
 * Gets the current maximization state of the window, as combination
 * of the %META_MAXIMIZE_HORIZONTAL and %META_MAXIMIZE_VERTICAL flags;
 *
 * Return value: current maximization state
 */
MetaMaximizeFlags
meta_window_get_maximized (MetaWindow *window)
{
  return ((window->maximized_horizontally ? META_MAXIMIZE_HORIZONTAL : 0) |
          (window->maximized_vertically ? META_MAXIMIZE_VERTICAL : 0));
}

/**
 * meta_window_is_fullscreen:
 * @window: a #MetaWindow
 *
 * Return value: %TRUE if the window is currently fullscreen
 */
gboolean
meta_window_is_fullscreen (MetaWindow *window)
{
  return window->fullscreen;
}

/**
 * meta_window_get_all_monitors:
 * @window: The #MetaWindow
 * @length: (out): gint holding the length, may be %NULL to ignore
 *
 * Returns: (array length=length) (element-type gint) (transfer container):
 *           List of the monitor indices the window is on.
 */
gint *
meta_window_get_all_monitors (MetaWindow *window, gsize *length)
{
  GArray *monitors;
  MetaRectangle window_rect;
  int i;

  monitors = g_array_new (FALSE, FALSE, sizeof (int));
  meta_window_get_frame_rect (window, &window_rect);

  for (i = 0; i < window->screen->n_monitor_infos; i++)
    {
      MetaRectangle *monitor_rect = &window->screen->monitor_infos[i].rect;

      if (meta_rectangle_overlap (&window_rect, monitor_rect))
        g_array_append_val (monitors, i);
    }

  if (length)
    *length = monitors->len;

  i = -1;
  g_array_append_val (monitors, i);

  return (gint*) g_array_free (monitors, FALSE);
}

/**
 * meta_window_is_screen_sized:
 * @window: A #MetaWindow
 *
 * Return value: %TRUE if the window is occupies the
 *               the whole screen (all monitors).
 */
gboolean
meta_window_is_screen_sized (MetaWindow *window)
{
  MetaRectangle window_rect;
  int screen_width, screen_height;

  meta_screen_get_size (window->screen, &screen_width, &screen_height);
  meta_window_get_frame_rect (window, &window_rect);

  if (window_rect.x == 0 && window_rect.y == 0 &&
      window_rect.width == screen_width && window_rect.height == screen_height)
    return TRUE;

  return FALSE;
}

/**
 * meta_window_is_monitor_sized:
 * @window: a #MetaWindow
 *
 * Return value: %TRUE if the window is occupies an entire monitor or
 *               the whole screen.
 */
gboolean
meta_window_is_monitor_sized (MetaWindow *window)
{
  if (window->fullscreen)
    return TRUE;

  if (meta_window_is_screen_sized (window))
    return TRUE;

  if (window->override_redirect)
    {
      MetaRectangle window_rect, monitor_rect;

      meta_window_get_frame_rect (window, &window_rect);
      meta_screen_get_monitor_geometry (window->screen, window->monitor->number, &monitor_rect);

      /*if (meta_rectangle_equal (&window_rect, &monitor_rect))*/
        /*return TRUE;*/
    }

  return FALSE;
}

/**
 * meta_window_is_on_primary_monitor:
 * @window: a #MetaWindow
 *
 * Return value: %TRUE if the window is on the primary monitor
 */
gboolean
meta_window_is_on_primary_monitor (MetaWindow *window)
{
  return window->monitor->is_primary;
}

/**
 * meta_window_requested_bypass_compositor:
 * @window: a #MetaWindow
 *
 * Return value: %TRUE if the window requested to bypass the compositor
 */
gboolean
meta_window_requested_bypass_compositor (MetaWindow *window)
{
  return window->bypass_compositor == _NET_WM_BYPASS_COMPOSITOR_HINT_ON;
}

/**
 * meta_window_requested_dont_bypass_compositor:
 * @window: a #MetaWindow
 *
 * Return value: %TRUE if the window requested to opt out of unredirecting
 */
gboolean
meta_window_requested_dont_bypass_compositor (MetaWindow *window)
{
  return window->bypass_compositor == _NET_WM_BYPASS_COMPOSITOR_HINT_OFF;
}

void
meta_window_tile (MetaWindow *window)
{
  MetaMaximizeFlags directions;

  /* Don't do anything if no tiling is requested */
  if (window->tile_mode == META_TILE_NONE)
    return;

  if (window->tile_mode == META_TILE_MAXIMIZED)
    directions = META_MAXIMIZE_BOTH;
  else
    directions = META_MAXIMIZE_VERTICAL;

  if (meta_screen_has_tiled_window_for_monitor (window->tile_mode, window))
    {
      meta_verbose ("another window is tiled in the same mode, disallow this request");
      window->tile_mode = META_TILE_NONE;
      meta_screen_update_tile_preview (window->screen, FALSE);
      return;
    }

  meta_window_maximize_internal (window, directions, NULL);
  meta_window_compute_tile_counterpart (window);
  meta_screen_update_tile_preview (window->screen, FALSE);

  meta_window_move_resize_now (window);

  if (window->frame)
    meta_frame_queue_draw (window->frame);

  if (!window->tile_counterpart && window->tile_mode != META_TILE_MAXIMIZED)
    meta_compositor_tile_window (window->display->compositor, window);
}

static gboolean
meta_window_can_tile_maximized (MetaWindow *window)
{
  return window->has_maximize_func;
}

MetaTileSide
meta_window_get_tile_mode (MetaWindow *window)
{
    return window->tile_mode;
}

gboolean
meta_window_can_tile_side_by_side (MetaWindow *window)
{
  int monitor;
  MetaRectangle tile_area;
  MetaRectangle client_rect;

  if (!meta_window_can_tile_maximized (window))
    return FALSE;

  monitor = meta_screen_get_current_monitor (window->screen);
  meta_window_get_work_area_for_monitor (window, monitor, &tile_area);

  /* Do not allow tiling in portrait orientation */
  if (tile_area.height > tile_area.width)
    return FALSE;

  tile_area.width /= 2;

  meta_window_frame_rect_to_client_rect (window, &tile_area, &client_rect);

  return client_rect.width >= window->size_hints.min_width &&
         client_rect.height >= window->size_hints.min_height;
}

static void
unmaximize_window_before_freeing (MetaWindow        *window)
{
  meta_topic (META_DEBUG_WINDOW_OPS,
              "Unmaximizing %s just before freeing\n",
              window->desc);

  window->maximized_horizontally = FALSE;
  window->maximized_vertically = FALSE;

  if (window->withdrawn)                /* See bug #137185 */
    {
      window->rect = window->saved_rect;
      set_net_wm_state (window);
    }
  else if (window->screen->closing)     /* See bug #358042 */
    {
      /* Do NOT update net_wm_state: this screen is closing,
       * it likely will be managed by another window manager
       * that will need the current _NET_WM_STATE atoms.
       * Moreover, it will need to know the unmaximized geometry,
       * therefore move_resize the window to saved_rect here
       * before closing it. */
      meta_window_move_resize_frame (window,
                                     FALSE,
                                     window->saved_rect.x,
                                     window->saved_rect.y,
                                     window->saved_rect.width,
                                     window->saved_rect.height);
    }
}

void
meta_window_unmaximize (MetaWindow        *window,
                        MetaMaximizeFlags  directions)
{
  gboolean unmaximize_horizontally, unmaximize_vertically;
  MetaRectangle new_rect;

  g_return_if_fail (!window->override_redirect);

  /* At least one of the two directions ought to be set */
  unmaximize_horizontally = directions & META_MAXIMIZE_HORIZONTAL;
  unmaximize_vertically   = directions & META_MAXIMIZE_VERTICAL;
  g_assert (unmaximize_horizontally || unmaximize_vertically);

  if (unmaximize_horizontally && unmaximize_vertically)
    window->saved_maximize = FALSE;

  /* Only do something if the window isn't already maximized in the
   * given direction(s).
   */
  if ((unmaximize_horizontally && window->maximized_horizontally) ||
      (unmaximize_vertically   && window->maximized_vertically))
    {
      MetaRectangle *desired_rect;
      MetaRectangle target_rect;
      MetaRectangle work_area;
      MetaRectangle old_frame_rect, old_buffer_rect;

      meta_window_get_work_area_for_monitor (window, window->monitor->number, &work_area);
      meta_window_get_frame_rect (window, &old_frame_rect);
      meta_window_get_buffer_rect (window, &old_buffer_rect);

      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Unmaximizing %s%s\n",
                  window->desc,
                  unmaximize_horizontally && unmaximize_vertically ? "" :
                    unmaximize_horizontally ? " horizontally" :
                      unmaximize_vertically ? " vertically" : "BUGGGGG");

      window->maximized_horizontally =
        window->maximized_horizontally && !unmaximize_horizontally;
      window->maximized_vertically =
        window->maximized_vertically   && !unmaximize_vertically;

      /* recalc_features() will eventually clear the cached frame
       * extents, but we need the correct frame extents in the code below,
       * so invalidate the old frame extents manually up front.
       */
      meta_window_frame_size_changed (window);

      desired_rect = &window->saved_rect;

      /* Unmaximize to the saved_rect position in the direction(s)
       * being unmaximized.
       */
      target_rect = old_frame_rect;

      /* Avoid unmaximizing to "almost maximized" size when the previous size
       * is greater then 80% of the work area use MAX_UNMAXIMIZED_WINDOW_AREA of the work area as upper limit
       * while maintaining the aspect ratio.
       */
      if (unmaximize_horizontally && unmaximize_vertically &&
          desired_rect->width * desired_rect->height > work_area.width * work_area.height * MAX_UNMAXIMIZED_WINDOW_AREA)
        {
          if (desired_rect->width > desired_rect->height)
            {
              float aspect = (float)desired_rect->height / (float)desired_rect->width;
              desired_rect->width = MAX (work_area.width * sqrt (MAX_UNMAXIMIZED_WINDOW_AREA), window->size_hints.min_width);
              desired_rect->height = MAX (desired_rect->width * aspect, window->size_hints.min_height);
            }
          else
            {
              float aspect = (float)desired_rect->width / (float)desired_rect->height;
              desired_rect->height = MAX (work_area.height * sqrt (MAX_UNMAXIMIZED_WINDOW_AREA), window->size_hints.min_height);
              desired_rect->width = MAX (desired_rect->height * aspect, window->size_hints.min_width);
            }
        }

      if (unmaximize_horizontally)
        {
          target_rect.x     = desired_rect->x;
          target_rect.width = desired_rect->width;
        }
      if (unmaximize_vertically)
        {
          target_rect.y      = desired_rect->y;
          target_rect.height = desired_rect->height;
        }

      /* Window's size hints may have changed while maximized, making
       * saved_rect invalid.  #329152
       */
      meta_window_frame_rect_to_client_rect (window, &target_rect, &target_rect);
      ensure_size_hints_satisfied (&target_rect, &window->size_hints);
      meta_window_client_rect_to_frame_rect (window, &target_rect, &target_rect);

      meta_window_move_resize_internal (window,
                                        (META_MOVE_RESIZE_MOVE_ACTION |
                                         META_MOVE_RESIZE_RESIZE_ACTION |
                                         META_MOVE_RESIZE_STATE_CHANGED |
                                         META_MOVE_RESIZE_DONT_SYNC_COMPOSITOR),
                                        NorthWestGravity,
                                        target_rect);

      meta_window_get_frame_rect (window, &new_rect);
      meta_compositor_size_change_window (window->display->compositor, window,
                                          META_SIZE_CHANGE_UNMAXIMIZE,
                                          &old_frame_rect, &old_buffer_rect);

      /* When we unmaximize, if we're doing a mouse move also we could
       * get the window suddenly jumping to the upper left corner of
       * the workspace, since that's where it was when the grab op
       * started.  So we need to update the grab state. We have to do
       * it after the actual operation, as the window may have been moved
       * by constraints.
       */
      if (meta_grab_op_is_moving (window->display->grab_op) &&
          window->display->grab_window == window)
        {
          window->display->grab_anchor_window_pos = window->unconstrained_rect;
        }

      meta_window_recalc_features (window);
      set_net_wm_state (window);
      if (!window->monitor->in_fullscreen)
        meta_screen_queue_check_fullscreen (window->screen);
    }

  g_object_freeze_notify (G_OBJECT (window));
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MAXIMIZED_HORIZONTALLY]);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MAXIMIZED_VERTICALLY]);
  g_object_thaw_notify (G_OBJECT (window));
}

void
meta_window_make_above (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_set_above (window, TRUE);
  meta_window_raise (window);
}

void
meta_window_unmake_above (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_set_above (window, FALSE);
  meta_window_raise (window);
}

static void
meta_window_set_above (MetaWindow *window,
                       gboolean    new_value)
{
  new_value = new_value != FALSE;
  if (new_value == window->wm_state_above)
    return;

  window->wm_state_above = new_value;
  meta_window_update_layer (window);
  set_net_wm_state (window);
  meta_window_frame_size_changed (window);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_ABOVE]);
}

void
meta_window_make_fullscreen_internal (MetaWindow  *window)
{
  if (!window->fullscreen)
    {
      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Fullscreening %s\n", window->desc);

      if (window->shaded)
        {
          /* Shading sucks anyway; I'm not adding a timestamp argument
           * to this function just for this niche usage & corner case.
           */
          guint32 timestamp =
            meta_display_get_current_time_roundtrip (window->display);
          meta_window_unshade (window, timestamp);
        }

      meta_window_save_rect (window);

      window->fullscreen = TRUE;

      meta_stack_freeze (window->screen->stack);
      meta_window_update_layer (window);

      meta_window_raise (window);
      meta_stack_thaw (window->screen->stack);

      meta_window_recalc_features (window);
      set_net_wm_state (window);

      /* For the auto-minimize feature, if we fail to get focus */
      meta_screen_queue_check_fullscreen (window->screen);

      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_FULLSCREEN]);
    }
}

void
meta_window_make_fullscreen (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (!window->fullscreen)
    {
      MetaRectangle old_frame_rect, old_buffer_rect;

      meta_window_get_frame_rect (window, &old_frame_rect);
      meta_window_get_buffer_rect (window, &old_buffer_rect);

      meta_window_make_fullscreen_internal (window);
      meta_window_move_resize_internal (window,
                                        (META_MOVE_RESIZE_MOVE_ACTION |
                                         META_MOVE_RESIZE_RESIZE_ACTION |
                                         META_MOVE_RESIZE_STATE_CHANGED |
                                         META_MOVE_RESIZE_DONT_SYNC_COMPOSITOR),
                                        NorthWestGravity,
                                        window->unconstrained_rect);

      meta_compositor_size_change_window (window->display->compositor,
                                          window, META_SIZE_CHANGE_FULLSCREEN,
                                          &old_frame_rect, &old_buffer_rect);
    }
}

void
meta_window_unmake_fullscreen (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  if (window->fullscreen)
    {
      MetaRectangle old_frame_rect, old_buffer_rect, target_rect;

      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Unfullscreening %s\n", window->desc);

      window->fullscreen = FALSE;
      target_rect = window->saved_rect;

      meta_window_frame_size_changed (window);
      meta_window_get_frame_rect (window, &old_frame_rect);
      meta_window_get_buffer_rect (window, &old_buffer_rect);

      /* Window's size hints may have changed while maximized, making
       * saved_rect invalid.  #329152
       */
      meta_window_frame_rect_to_client_rect (window, &target_rect, &target_rect);
      ensure_size_hints_satisfied (&target_rect, &window->size_hints);
      meta_window_client_rect_to_frame_rect (window, &target_rect, &target_rect);

      /* Need to update window->has_resize_func before we move_resize()
       */
      meta_window_recalc_features (window);
      set_net_wm_state (window);

      meta_window_move_resize_internal (window,
                                        (META_MOVE_RESIZE_MOVE_ACTION |
                                         META_MOVE_RESIZE_RESIZE_ACTION |
                                         META_MOVE_RESIZE_STATE_CHANGED |
                                         META_MOVE_RESIZE_DONT_SYNC_COMPOSITOR),
                                        NorthWestGravity,
                                        target_rect);

      meta_compositor_size_change_window (window->display->compositor,
                                          window, META_SIZE_CHANGE_UNFULLSCREEN,
                                          &old_frame_rect, &old_buffer_rect);

      meta_window_update_layer (window);

      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_FULLSCREEN]);
    }
}

void
meta_window_update_fullscreen_monitors (MetaWindow    *window,
                                        unsigned long  top,
                                        unsigned long  bottom,
                                        unsigned long  left,
                                        unsigned long  right)
{
  if ((int)top < window->screen->n_monitor_infos &&
      (int)bottom < window->screen->n_monitor_infos &&
      (int)left < window->screen->n_monitor_infos &&
      (int)right < window->screen->n_monitor_infos)
    {
      window->fullscreen_monitors[0] = top;
      window->fullscreen_monitors[1] = bottom;
      window->fullscreen_monitors[2] = left;
      window->fullscreen_monitors[3] = right;
    }
  else
    {
      window->fullscreen_monitors[0] = -1;
    }

  if (window->fullscreen)
    {
      meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
    }
}

void
meta_window_shade (MetaWindow  *window,
                   guint32      timestamp)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Shading %s\n", window->desc);
  if (!window->shaded)
    {
      window->shaded = TRUE;

      meta_window_queue(window, META_QUEUE_MOVE_RESIZE | META_QUEUE_CALC_SHOWING);
      meta_window_frame_size_changed (window);

      /* After queuing the calc showing, since _focus flushes it,
       * and we need to focus the frame
       */
      meta_topic (META_DEBUG_FOCUS,
                  "Re-focusing window %s after shading it\n",
                  window->desc);
      meta_window_focus (window, timestamp);

      set_net_wm_state (window);
    }
}

void
meta_window_unshade (MetaWindow  *window,
                     guint32      timestamp)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Unshading %s\n", window->desc);
  if (window->shaded)
    {
      window->shaded = FALSE;
      meta_window_queue(window, META_QUEUE_MOVE_RESIZE | META_QUEUE_CALC_SHOWING);
      meta_window_frame_size_changed (window);

      /* focus the window */
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing window %s after unshading it\n",
                  window->desc);
      meta_window_focus (window, timestamp);

      set_net_wm_state (window);
    }
}

static gboolean
unminimize_func (MetaWindow *window,
                 void       *data)
{
  meta_window_unminimize (window);
  return TRUE;
}

static void
unminimize_window_and_all_transient_parents (MetaWindow *window)
{
  meta_window_unminimize (window);
  meta_window_foreach_ancestor (window, unminimize_func, NULL);
}

void
meta_window_activate_full (MetaWindow     *window,
                           guint32         timestamp,
                           MetaClientType  source_indication,
                           MetaWorkspace  *workspace)
{
  gboolean allow_workspace_switch;
  meta_topic (META_DEBUG_FOCUS,
              "_NET_ACTIVE_WINDOW message sent for %s at time %u "
              "by client type %u.\n",
              window->desc, timestamp, source_indication);

  allow_workspace_switch = (timestamp != 0);
  if (timestamp != 0 &&
      XSERVER_TIME_IS_BEFORE (timestamp, window->display->last_user_time))
    {
      /* this comment comes from openbox:
       * we can not trust the timestamp from applications.
         e.g. chromium passes a very old timestamp.  openbox thinks
         the window will get focus and calls XSetInputFocus with the
         (old) timestamp, which doesn't end up moving focus at all.
         but the window is raised, not hilited, etc, as if it was
         really going to get focus.

         so do not use this timestamp in data.l[1], as this would
         be used in XSetInputFocus.
         */
      meta_topic (META_DEBUG_FOCUS,
                  "last_user_time (%u) is more recent; ignoring "
                  " _NET_ACTIVE_WINDOW timestamp.\n",
                  window->display->last_user_time);
      /*meta_window_set_demands_attention(window);*/
      timestamp = 0;
    }

  if (timestamp == 0)
    timestamp = meta_display_get_current_time_roundtrip (window->display);

  meta_window_set_user_time (window, timestamp);

  meta_verbose ("%s: maybe_leave_show_desktop_mode\n", __func__);

  /* disable show desktop mode unless we're a desktop component */
  maybe_leave_show_desktop_mode (window);

  /* Get window on current or given workspace */
  if (workspace == NULL)
    workspace = window->screen->active_workspace;

  /* For non-transient windows, we just set up a pulsing indicator,
     rather than move windows or workspaces.
     See http://bugzilla.gnome.org/show_bug.cgi?id=482354 */
  if (window->transient_for == NULL &&
      !allow_workspace_switch &&
      !meta_window_located_on_workspace (window, workspace))
    {
      meta_window_set_demands_attention (window);
      /* We've marked it as demanding, don't need to do anything else. */
      return;
    }
  else if (window->transient_for != NULL)
    {
      /* Move transients to current workspace - preference dialogs should appear over
         the source window.  */
      meta_window_change_workspace (window, workspace);
    }

  if (window->shaded)
    meta_window_unshade (window, timestamp);

  unminimize_window_and_all_transient_parents (window);

  if (meta_prefs_get_raise_on_click () ||
      source_indication == META_CLIENT_TYPE_PAGER)
    meta_window_raise (window);

  meta_topic (META_DEBUG_FOCUS,
              "Focusing window %s due to activation\n",
              window->desc);

  if (meta_window_located_on_workspace (window, workspace))
    meta_window_focus (window, timestamp);
  else
    meta_workspace_activate_with_focus (window->workspace, window, timestamp);

  meta_window_check_alive (window, timestamp);
}

/* This function exists since most of the functionality in window_activate
 * is useful for Mutter, but Mutter shouldn't need to specify a client
 * type for itself.  ;-)
 */
void
meta_window_activate (MetaWindow     *window,
                      guint32         timestamp)
{
  g_return_if_fail (!window->override_redirect);

  /* We're not really a pager, but the behavior we want is the same as if
   * we were such.  If we change the pager behavior later, we could revisit
   * this and just add extra flags to window_activate.
   */
  meta_window_activate_full (window, timestamp, META_CLIENT_TYPE_PAGER, NULL);
}

void
meta_window_activate_with_workspace (MetaWindow     *window,
                                     guint32         timestamp,
                                     MetaWorkspace  *workspace)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_activate_full (window, timestamp, META_CLIENT_TYPE_APPLICATION, workspace);
}

/**
 * meta_window_updates_are_frozen:
 * @window: a #MetaWindow
 *
 * Gets whether the compositor should be updating the window contents;
 * window content updates may be frozen at client request by setting
 * an odd value in the extended _NET_WM_SYNC_REQUEST_COUNTER counter
 * by the window manager during a resize operation while waiting for
 * the client to redraw.
 *
 * Return value: %TRUE if updates are currently frozen
 */
gboolean
meta_window_updates_are_frozen (MetaWindow *window)
{
  if (window->extended_sync_request_counter &&
      window->sync_request_serial % 2 == 1)
    return TRUE;

  if (window->sync_request_serial < window->sync_request_wait_serial)
    return TRUE;

  return FALSE;
}

static gboolean
maybe_move_attached_dialog (MetaWindow *window,
                            void       *data)
{
  if (meta_window_is_attached_dialog (window))
    /* It ignores x,y for such a dialog  */
    meta_window_move_frame (window, FALSE, 0, 0);

  return FALSE;
}

/**
 * meta_window_get_monitor:
 * @window: a #MetaWindow
 *
 * Gets index of the monitor that this window is on.
 *
 * Return Value: The index of the monitor in the screens monitor list
 */
int
meta_window_get_monitor (MetaWindow *window)
{
  return window->monitor->number;
}

static MetaMonitorInfo *
find_monitor_by_winsys_id (MetaWindow *window,
                           guint       winsys_id)
{
  int i;

  for (i = 0; i < window->screen->n_monitor_infos; i++)
    {
      MetaMonitorInfo *info = &window->screen->monitor_infos[i];

      if (info->winsys_id == winsys_id)
        return info;
    }

  return NULL;
}

/* This is called when the monitor setup has changed. The window->monitor
 * reference is still "valid", but refer to the previous monitor setup */
void
meta_window_update_for_monitors_changed (MetaWindow *window)
{
  const MetaMonitorInfo *old, *new;

  if (window->override_redirect || window->type == META_WINDOW_DESKTOP)
    {
      meta_window_update_monitor (window, FALSE);
      return;
    }

  old = window->monitor;

  /* Try the preferred output first */
  new = find_monitor_by_winsys_id (window, window->preferred_output_winsys_id);

  /* Otherwise, try to find the old output on a new monitor */
  if (!new)
    new = find_monitor_by_winsys_id (window, old->winsys_id);

  /* Fall back to primary if everything else failed */
  if (!new)
    new = &window->screen->monitor_infos[window->screen->primary_monitor_index];

  if (window->tile_mode != META_TILE_NONE)
    window->tile_monitor_number = new->number;

  /* This will eventually reach meta_window_update_monitor that
   * will send leave/enter-monitor events. The old != new monitor
   * check will always fail (due to the new monitor_infos set) so
   * we will always send the events, even if the new and old monitor
   * index is the same. That is right, since the enumeration of the
   * monitors changed and the same index could be refereing
   * to a different monitor. */
  meta_window_move_between_rects (window,
                                  &old->rect,
                                  &new->rect);
}

void
meta_window_update_monitor (MetaWindow *window,
                            gboolean    user_op)
{
  const MetaMonitorInfo *old;

  old = window->monitor;
  META_WINDOW_GET_CLASS (window)->update_main_monitor (window);
  if (old != window->monitor)
    {
      meta_window_on_all_workspaces_changed (window);

      /* If workspaces only on primary and we moved back to primary due to a user action,
       * ensure that the window is now in that workspace. We do this because while
       * the window is on a non-primary monitor it is always visible, so it would be
       * very jarring if it disappeared when it crossed the monitor border.
       * The one time we want it to both change to the primary monitor and a non-active
       * workspace is when dropping the window on some other workspace thumbnail directly.
       * That should be handled by explicitly moving the window before changing the
       * workspace.
       */
      if (meta_prefs_get_workspaces_only_on_primary () && user_op &&
          meta_window_is_on_primary_monitor (window)  &&
          window->screen->active_workspace != window->workspace)
        meta_window_change_workspace (window, window->screen->active_workspace);

      meta_window_main_monitor_changed (window, old);

      /* If we're changing monitors, we need to update the has_maximize_func flag,
       * as the working area has changed. */
      meta_window_recalc_features (window);
    }
}

void
meta_window_move_resize_internal (MetaWindow          *window,
                                  MetaMoveResizeFlags  flags,
                                  int                  gravity,
                                  MetaRectangle        frame_rect)
{
  /* The rectangle here that's passed in *always* in "frame rect"
   * coordinates. That means the position of the frame's visible bounds,
   * with x and y being absolute (root window) coordinates.
   *
   * For an X11 framed window, the client window's server rectangle is
   * inset from this rectangle by the frame's visible borders, and the
   * frame window's server rectangle is outset by the invisible borders.
   *
   * For an X11 unframed window, the rectangle here directly matches
   * the server's rectangle, since the visible and invisible borders
   * are both 0.
   *
   * For an X11 CSD window, the client window's server rectangle is
   * outset from this rectagle by the client-specified frame extents.
   *
   * For a Wayland window, this rectangle can simply be sent directly
   * to the client.
   */

  gboolean did_placement;
  guint old_output_winsys_id;
  MetaRectangle unconstrained_rect;
  MetaRectangle constrained_rect;
  MetaMoveResizeResultFlags result = 0;

  g_return_if_fail (!window->override_redirect);

  /* The action has to be a move, a resize or the wayland client
   * acking our choice of size.
   */
  g_assert (flags & (META_MOVE_RESIZE_MOVE_ACTION | META_MOVE_RESIZE_RESIZE_ACTION | META_MOVE_RESIZE_WAYLAND_RESIZE));

  did_placement = !window->placed && window->calc_placement;

  /* We don't need it in the idle queue anymore. */
  meta_window_unqueue (window, META_QUEUE_MOVE_RESIZE);

  if ((flags & META_MOVE_RESIZE_RESIZE_ACTION) && (flags & META_MOVE_RESIZE_MOVE_ACTION))
    {
      /* We're both moving and resizing. Just use the passed in rect. */
      unconstrained_rect = frame_rect;
    }
  else if ((flags & META_MOVE_RESIZE_RESIZE_ACTION))
    {
      /* If this is only a resize, then ignore the position given in
       * the parameters and instead calculate the new position from
       * resizing the old rectangle with the given gravity. */
      meta_rectangle_resize_with_gravity (&window->rect,
                                          &unconstrained_rect,
                                          gravity,
                                          frame_rect.width,
                                          frame_rect.height);
    }
  else if ((flags & META_MOVE_RESIZE_MOVE_ACTION))
    {
      /* If this is only a move, then ignore the passed in size and
       * just use the existing size of the window. */
      unconstrained_rect.x = frame_rect.x;
      unconstrained_rect.y = frame_rect.y;
      unconstrained_rect.width = window->rect.width;
      unconstrained_rect.height = window->rect.height;
    }
  else if ((flags & META_MOVE_RESIZE_WAYLAND_RESIZE))
    {
      /* This is a Wayland buffer acking our size. The new rect is
       * just the existing one we have. Ignore the passed-in rect
       * completely. */
      unconstrained_rect = window->rect;
    }
  else
    g_assert_not_reached ();

  constrained_rect = unconstrained_rect;
  if ((flags & (META_MOVE_RESIZE_MOVE_ACTION | META_MOVE_RESIZE_RESIZE_ACTION)) &&
        !window->deepin_override)
    {
      MetaRectangle old_rect;
      meta_window_get_frame_rect (window, &old_rect);

      meta_window_constrain (window,
                             flags,
                             gravity,
                             &old_rect,
                             &constrained_rect);
    }

  /* If we did placement, then we need to save the position that the window
   * was placed at to make sure that meta_window_move_resize_now places the
   * window correctly.
   */
  if (did_placement)
    {
      unconstrained_rect.x = constrained_rect.x;
      unconstrained_rect.y = constrained_rect.y;
    }

  /* Do the protocol-specific move/resize logic */
  META_WINDOW_GET_CLASS (window)->move_resize_internal (window, gravity, unconstrained_rect, constrained_rect, flags, &result);

  if (result & META_MOVE_RESIZE_RESULT_MOVED)
    g_signal_emit (window, window_signals[POSITION_CHANGED], 0);

  if (result & META_MOVE_RESIZE_RESULT_RESIZED)
    g_signal_emit (window, window_signals[SIZE_CHANGED], 0);

  if ((result & (META_MOVE_RESIZE_RESULT_MOVED | META_MOVE_RESIZE_RESULT_RESIZED)) != 0 || did_placement)
    {
      window->unconstrained_rect = unconstrained_rect;

      if (window->known_to_compositor && !(flags & META_MOVE_RESIZE_DONT_SYNC_COMPOSITOR))
        meta_compositor_sync_window_geometry (window->display->compositor,
                                              window,
                                              did_placement);
    }

  old_output_winsys_id = window->monitor->winsys_id;

  meta_window_update_monitor (window, flags & META_MOVE_RESIZE_USER_ACTION);

  if (old_output_winsys_id != window->monitor->winsys_id &&
      flags & META_MOVE_RESIZE_MOVE_ACTION && flags & META_MOVE_RESIZE_USER_ACTION)
    window->preferred_output_winsys_id = window->monitor->winsys_id;

  if ((result & META_MOVE_RESIZE_RESULT_FRAME_SHAPE_CHANGED) && window->frame_bounds)
    {
      cairo_region_destroy (window->frame_bounds);
      window->frame_bounds = NULL;
    }

  meta_window_foreach_transient (window, maybe_move_attached_dialog, NULL);

  meta_stack_update_window_tile_matches (window->screen->stack,
                                         window->screen->active_workspace);
}

/**
 * meta_window_move_frame:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @root_x_nw: desired x pos
 * @root_y_nw: desired y pos
 *
 * Moves the window to the desired location on window's assigned
 * workspace, using the northwest edge of the frame as the reference,
 * instead of the actual window's origin, but only if a frame is present.
 * Otherwise, acts identically to meta_window_move().
 */
void
meta_window_move_frame (MetaWindow *window,
                        gboolean    user_op,
                        int         root_x_nw,
                        int         root_y_nw)
{
  MetaMoveResizeFlags flags;
  MetaRectangle rect = { root_x_nw, root_y_nw, 0, 0 };

  g_return_if_fail (!window->override_redirect);

  flags = (user_op ? META_MOVE_RESIZE_USER_ACTION : 0) | META_MOVE_RESIZE_MOVE_ACTION;
  meta_window_move_resize_internal (window, flags, NorthWestGravity, rect);
}

static void
meta_window_move_between_rects (MetaWindow  *window,
                                const MetaRectangle *old_area,
                                const MetaRectangle *new_area)
{
  int rel_x, rel_y;
  double scale_x, scale_y;

  rel_x = window->unconstrained_rect.x - old_area->x;
  rel_y = window->unconstrained_rect.y - old_area->y;
  scale_x = (double)new_area->width / old_area->width;
  scale_y = (double)new_area->height / old_area->height;

  window->unconstrained_rect.x = new_area->x + rel_x * scale_x;
  window->unconstrained_rect.y = new_area->y + rel_y * scale_y;
  window->saved_rect.x = window->unconstrained_rect.x;
  window->saved_rect.y = window->unconstrained_rect.y;

  meta_window_move_resize_now (window);
}

/**
 * meta_window_move_resize_frame:
 * @window: a #MetaWindow
 * @user_op: bool to indicate whether or not this is a user operation
 * @root_x_nw: new x
 * @root_y_nw: new y
 * @w: desired width
 * @h: desired height
 *
 * Resizes the window so that its outer bounds (including frame)
 * fit within the given rect
 */
void
meta_window_move_resize_frame (MetaWindow  *window,
                               gboolean     user_op,
                               int          root_x_nw,
                               int          root_y_nw,
                               int          w,
                               int          h)
{
  MetaMoveResizeFlags flags;
  MetaRectangle rect = { root_x_nw, root_y_nw, w, h };

  g_return_if_fail (!window->override_redirect);

  flags = (user_op ? META_MOVE_RESIZE_USER_ACTION : 0) | META_MOVE_RESIZE_MOVE_ACTION | META_MOVE_RESIZE_RESIZE_ACTION;

  meta_window_move_resize_internal (window, flags, NorthWestGravity, rect);
}

/**
 * meta_window_move_to_monitor:
 * @window: a #MetaWindow
 * @monitor: desired monitor index
 *
 * Moves the window to the monitor with index @monitor, keeping
 * the relative position of the window's top left corner.
 */
void
meta_window_move_to_monitor (MetaWindow  *window,
                             int          monitor)
{
  MetaRectangle old_area, new_area;

  if (monitor == window->monitor->number)
    return;

  meta_window_get_work_area_for_monitor (window,
                                         window->monitor->number,
                                         &old_area);
  meta_window_get_work_area_for_monitor (window,
                                         monitor,
                                         &new_area);

  if (window->tile_mode != META_TILE_NONE)
    window->tile_monitor_number = monitor;

  meta_window_move_between_rects (window, &old_area, &new_area);
  window->preferred_output_winsys_id = window->monitor->winsys_id;

  if (window->fullscreen || window->override_redirect)
    meta_screen_queue_check_fullscreen (window->screen);
}

void
meta_window_resize_frame_with_gravity (MetaWindow *window,
                                       gboolean     user_op,
                                       int          w,
                                       int          h,
                                       int          gravity)
{
  MetaMoveResizeFlags flags;
  MetaRectangle rect;

  rect.width = w;
  rect.height = h;

  flags = (user_op ? META_MOVE_RESIZE_USER_ACTION : 0) | META_MOVE_RESIZE_RESIZE_ACTION;
  meta_window_move_resize_internal (window, flags, gravity, rect);
}

static void
meta_window_move_resize_now (MetaWindow  *window)
{
  MetaRectangle rect = window->unconstrained_rect;

  if (!window->calc_placement && META_WINDOW_TILED_SIDE_BY_SIDE (window))
    {
      MetaRectangle tile_area;
      meta_window_get_current_tile_area (window, &tile_area);
      rect.width = tile_area.width;
    }

  meta_window_move_resize_frame (window, FALSE,
                                 rect.x,
                                 rect.y,
                                 rect.width,
                                 rect.height);
}

static gboolean
idle_move_resize (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  guint queue_index = GPOINTER_TO_INT (data);

  meta_topic (META_DEBUG_GEOMETRY, "Clearing the move_resize queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue move_resizes.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      /* As a side effect, sets window->move_resize_queued = FALSE */
      meta_window_move_resize_now (window);

      tmp = tmp->next;
    }

  g_slist_free (copy);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

void
meta_window_get_gravity_position (MetaWindow  *window,
                                  int          gravity,
                                  int         *root_x,
                                  int         *root_y)
{
  MetaRectangle frame_extents;
  int w, h;
  int x, y;

  w = window->rect.width;
  h = window->rect.height;

  if (gravity == StaticGravity)
    {
      frame_extents = window->rect;
      if (window->frame)
        {
          frame_extents.x = window->frame->rect.x + window->frame->child_x;
          frame_extents.y = window->frame->rect.y + window->frame->child_y;
        }
    }
  else
    {
      if (window->frame == NULL)
        frame_extents = window->rect;
      else
        frame_extents = window->frame->rect;
    }

  x = frame_extents.x;
  y = frame_extents.y;

  switch (gravity)
    {
    case NorthGravity:
    case CenterGravity:
    case SouthGravity:
      /* Find center of frame. */
      x += frame_extents.width / 2;
      /* Center client window on that point. */
      x -= w / 2;
      break;

    case SouthEastGravity:
    case EastGravity:
    case NorthEastGravity:
      /* Find right edge of frame */
      x += frame_extents.width;
      /* Align left edge of client at that point. */
      x -= w;
      break;
    default:
      break;
    }

  switch (gravity)
    {
    case WestGravity:
    case CenterGravity:
    case EastGravity:
      /* Find center of frame. */
      y += frame_extents.height / 2;
      /* Center client window there. */
      y -= h / 2;
      break;
    case SouthWestGravity:
    case SouthGravity:
    case SouthEastGravity:
      /* Find south edge of frame */
      y += frame_extents.height;
      /* Place bottom edge of client there */
      y -= h;
      break;
    default:
      break;
    }

  if (root_x)
    *root_x = x;
  if (root_y)
    *root_y = y;
}

void
meta_window_get_session_geometry (MetaWindow  *window,
                                  int         *x,
                                  int         *y,
                                  int         *width,
                                  int         *height)
{
  meta_window_get_gravity_position (window,
                                    window->size_hints.win_gravity,
                                    x, y);

  *width = (window->rect.width - window->size_hints.base_width) /
    window->size_hints.width_inc;
  *height = (window->rect.height - window->size_hints.base_height) /
    window->size_hints.height_inc;
}

/**
 * meta_window_get_buffer_rect:
 * @window: a #MetaWindow
 * @rect: (out): pointer to an allocated #MetaRectangle
 *
 * Gets the rectangle that the pixmap or buffer of @window occupies.
 *
 * For X11 windows, this is the server-side geometry of the toplevel
 * window.
 *
 * For Wayland windows, this is the bounding rectangle of the attached
 * buffer.
 */
void
meta_window_get_buffer_rect (const MetaWindow *window,
                             MetaRectangle    *rect)
{
  *rect = window->buffer_rect;
}

/**
 * meta_window_client_rect_to_frame_rect:
 * @window: a #MetaWindow
 * @client_rect: client rectangle in root coordinates
 * @frame_rect: (out): location to store the computed corresponding frame bounds.
 *
 * Converts a desired bounds of the client window into the corresponding bounds
 * of the window frame (excluding invisible borders and client side shadows.)
 */
void
meta_window_client_rect_to_frame_rect (MetaWindow    *window,
                                       MetaRectangle *client_rect,
                                       MetaRectangle *frame_rect)
{
  if (!frame_rect)
    return;

  *frame_rect = *client_rect;

  /* The support for G_MAXINT here to mean infinity is a convenience for
   * constraints.c:get_size_limits() and not something that we provide
   * in other locations or document.
   */
  if (window->frame)
    {
      MetaFrameBorders borders;
      meta_frame_calc_borders (window->frame, &borders);

      frame_rect->x -= borders.visible.left;
      frame_rect->y -= borders.visible.top;
      if (frame_rect->width != G_MAXINT)
        frame_rect->width += borders.visible.left + borders.visible.right;
      if (frame_rect->height != G_MAXINT)
        frame_rect->height += borders.visible.top  + borders.visible.bottom;
    }
  else
    {
      const GtkBorder *extents = &window->custom_frame_extents;
      frame_rect->x += extents->left;
      frame_rect->y += extents->top;
      if (frame_rect->width != G_MAXINT)
        frame_rect->width -= extents->left + extents->right;
      if (frame_rect->height != G_MAXINT)
        frame_rect->height -= extents->top + extents->bottom;
    }
}

/**
 * meta_window_frame_rect_to_client_rect:
 * @window: a #MetaWindow
 * @frame_rect: desired frame bounds for the window
 * @client_rect: (out): location to store the computed corresponding client rectangle.
 *
 * Converts a desired frame bounds for a window into the bounds of the client
 * window.
 */
void
meta_window_frame_rect_to_client_rect (MetaWindow    *window,
                                       MetaRectangle *frame_rect,
                                       MetaRectangle *client_rect)
{
  if (!client_rect)
    return;

  *client_rect = *frame_rect;

  if (window->frame)
    {
      MetaFrameBorders borders;
      meta_frame_calc_borders (window->frame, &borders);

      client_rect->x += borders.visible.left;
      client_rect->y += borders.visible.top;
      client_rect->width  -= borders.visible.left + borders.visible.right;
      client_rect->height -= borders.visible.top  + borders.visible.bottom;
    }
  else
    {
      const GtkBorder *extents = &window->custom_frame_extents;
      client_rect->x -= extents->left;
      client_rect->y -= extents->top;
      client_rect->width += extents->left + extents->right;
      client_rect->height += extents->top + extents->bottom;
    }
}

/**
 * meta_window_get_frame_rect:
 * @window: a #MetaWindow
 * @rect: (out): pointer to an allocated #MetaRectangle
 *
 * Gets the rectangle that bounds @window that is what the user thinks of
 * as the edge of the window. This doesn't include any extra reactive
 * area that we or the client adds to the window, or any area that the
 * client adds to draw a client-side shadow.
 */
void
meta_window_get_frame_rect (const MetaWindow *window,
                            MetaRectangle    *rect)
{
  *rect = window->rect;
}

/**
 * meta_window_get_client_area_rect:
 * @window: a #MetaWindow
 * @rect: (out): pointer to a cairo rectangle
 *
 * Gets the rectangle for the boundaries of the client area, relative
 * to the buffer rect. If the window is shaded, the height of the
 * rectangle is 0.
 */
void
meta_window_get_client_area_rect (const MetaWindow      *window,
                                  cairo_rectangle_int_t *rect)
{
  MetaFrameBorders borders;

  meta_frame_calc_borders (window->frame, &borders);

  rect->x = borders.total.left;
  rect->y = borders.total.top;

  rect->width = window->buffer_rect.width - borders.total.left - borders.total.right;
  if (window->shaded)
    rect->height = 0;
  else
    rect->height = window->buffer_rect.height - borders.total.top - borders.total.bottom;
}

void
meta_window_get_titlebar_rect (MetaWindow    *window,
                               MetaRectangle *rect)
{
  meta_window_get_frame_rect (window, rect);

  /* The returned rectangle is relative to the frame rect. */
  rect->x = 0;
  rect->y = 0;

  if (window->frame)
    {
      rect->height = window->frame->child_y;
    }
  else
    {
      /* Pick an arbitrary height for a titlebar. We might want to
       * eventually have CSD windows expose their borders to us. */
      rect->height = 50;
    }
}

const char*
meta_window_get_startup_id (MetaWindow *window)
{
  if (window->startup_id == NULL)
    {
      MetaGroup *group;

      group = meta_window_get_group (window);

      if (group != NULL)
        return meta_group_get_startup_id (group);
    }

  return window->startup_id;
}

static MetaWindow*
get_modal_transient (MetaWindow *window)
{
  GSList *windows;
  GSList *tmp;
  MetaWindow *modal_transient;

  /* A window can't be the transient of itself, but this is just for
   * convenience in the loop below; we manually fix things up at the
   * end if no real modal transient was found.
   */
  modal_transient = window;

  windows = meta_display_list_windows (window->display, META_LIST_DEFAULT);
  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *transient = tmp->data;

      if (transient->transient_for == modal_transient &&
          transient->type == META_WINDOW_MODAL_DIALOG)
        {
          modal_transient = transient;
          tmp = windows;
          continue;
        }

      tmp = tmp->next;
    }

  g_slist_free (windows);

  if (window == modal_transient)
    modal_transient = NULL;

  return modal_transient;
}

/* XXX META_EFFECT_FOCUS */
void
meta_window_focus (MetaWindow  *window,
                   guint32      timestamp)
{
  MetaWindow *modal_transient;

  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_FOCUS,
              "Setting input focus to window %s, input: %d take_focus: %d\n",
              window->desc, window->input, window->take_focus);

  if (window->display->grab_window &&
      window->display->grab_window->all_keys_grabbed &&
      !window->display->grab_window->unmanaging)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Current focus window %s has global keygrab, not focusing window %s after all\n",
                  window->display->grab_window->desc, window->desc);
      return;
    }

  modal_transient = get_modal_transient (window);
  if (modal_transient != NULL &&
      !modal_transient->unmanaging)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "%s has %s as a modal transient, so focusing it instead.\n",
                  window->desc, modal_transient->desc);
      if (!meta_window_located_on_workspace (modal_transient, window->screen->active_workspace))
        meta_window_change_workspace (modal_transient, window->screen->active_workspace);
      window = modal_transient;
    }

  meta_window_flush_calc_showing (window);

  if ((!window->mapped || window->hidden) && !window->shaded)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Window %s is not showing, not focusing after all\n",
                  window->desc);
      return;
    }

  META_WINDOW_GET_CLASS (window)->focus (window, timestamp);

  if (window->wm_state_demands_attention)
    meta_window_unset_demands_attention(window);

/*  meta_effect_run_focus(window, NULL, NULL); */
}

/* Workspace management. Invariants:
 *
 *  - window->workspace describes the workspace the window is on.
 *
 *  - workspace->windows is a list of windows that is located on
 *    that workspace.
 *
 *  - If the window is on_all_workspaces, then
 *    window->workspace == NULL, but workspace->windows contains
 *    the window.
 */

static void
set_workspace_state (MetaWindow    *window,
                     gboolean       on_all_workspaces,
                     MetaWorkspace *workspace)
{
  /* If we're on all workspaces, then our new workspace must be NULL. */
  if (on_all_workspaces)
    g_assert (workspace == NULL);

  /* If this is an override-redirect window, ensure that the only
   * times we're setting the workspace state is either during construction
   * to mark as on_all_workspaces, or when unmanaging to remove all the
   * workspaces. */
  if (window->override_redirect)
    g_return_if_fail ((window->constructing && on_all_workspaces) || window->unmanaging);

  if (on_all_workspaces == window->on_all_workspaces &&
      workspace == window->workspace &&
      !window->constructing)
    return;

  if (window->workspace)
    meta_workspace_remove_window (window->workspace, window);
  else if (window->on_all_workspaces)
    {
      GList *l;
      for (l = window->screen->workspaces; l != NULL; l = l->next)
        {
          MetaWorkspace *ws = l->data;
          meta_workspace_remove_window (ws, window);
        }
    }

  window->on_all_workspaces = on_all_workspaces;
  window->workspace = workspace;

  if (window->workspace)
    meta_workspace_add_window (window->workspace, window);
  else if (window->on_all_workspaces)
    {
      GList *l;
      for (l = window->screen->workspaces; l != NULL; l = l->next)
        {
          MetaWorkspace *ws = l->data;
          meta_workspace_add_window (ws, window);
        }
    }

  /* queue a move_resize since changing workspaces may change
   * the relevant struts
   */
  if (!window->override_redirect)
    meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
  meta_window_queue (window, META_QUEUE_CALC_SHOWING);
  meta_window_current_workspace_changed (window);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_ON_ALL_WORKSPACES]);
  g_signal_emit (window, window_signals[WORKSPACE_CHANGED], 0);
}

static gboolean
should_be_on_all_workspaces (MetaWindow *window)
{
  return
    window->always_sticky ||
    window->on_all_workspaces_requested ||
    window->override_redirect ||
    (meta_prefs_get_workspaces_only_on_primary () &&
     !window->unmanaging &&
     !meta_window_is_on_primary_monitor (window));
}

void
meta_window_on_all_workspaces_changed (MetaWindow *window)
{
  gboolean on_all_workspaces = should_be_on_all_workspaces (window);

  if (window->on_all_workspaces == on_all_workspaces)
    return;

  MetaWorkspace *workspace;

  if (on_all_workspaces)
    {
      workspace = NULL;
    }
  else
    {
      /* We're coming out of the sticky state. Put the window on
       * the currently active workspace. */
      workspace = window->screen->active_workspace;
    }

  set_workspace_state (window, on_all_workspaces, workspace);
}

static void
meta_window_change_workspace_without_transients (MetaWindow    *window,
                                                 MetaWorkspace *workspace)
{
  /* Try to unstick the window if it's stuck. This doesn't
   * have any guarantee that we'll actually unstick the
   * window, since it could be stuck for other reasons. */
  if (window->on_all_workspaces_requested)
    meta_window_unstick (window);

  /* We failed to unstick the window. */
  if (window->on_all_workspaces)
    return;

  if (window->workspace == workspace)
    return;

  set_workspace_state (window, FALSE, workspace);
}

static gboolean
change_workspace_foreach (MetaWindow *window,
                          void       *data)
{
  meta_window_change_workspace_without_transients (window, data);
  return TRUE;
}

void
meta_window_change_workspace (MetaWindow    *window,
                              MetaWorkspace *workspace)
{
  g_return_if_fail (!window->override_redirect);

  meta_window_change_workspace_without_transients (window, workspace);

  meta_window_foreach_transient (window, change_workspace_foreach,
                                 workspace);
  meta_window_foreach_ancestor (window, change_workspace_foreach,
                                workspace);
}

static void
window_stick_impl (MetaWindow  *window)
{
  meta_verbose ("Sticking window %s current on_all_workspaces = %d\n",
                window->desc, window->on_all_workspaces);

  if (window->on_all_workspaces_requested)
    return;

  /* We don't change window->workspaces, because we revert
   * to that original workspace list if on_all_workspaces is
   * toggled back off.
   */
  window->on_all_workspaces_requested = TRUE;
  meta_window_on_all_workspaces_changed (window);
}

static void
window_unstick_impl (MetaWindow  *window)
{
  if (!window->on_all_workspaces_requested)
    return;

  /* Revert to window->workspaces */

  window->on_all_workspaces_requested = FALSE;
  meta_window_on_all_workspaces_changed (window);
}

static gboolean
stick_foreach_func (MetaWindow *window,
                    void       *data)
{
  gboolean stick;

  stick = *(gboolean*)data;
  if (stick)
    window_stick_impl (window);
  else
    window_unstick_impl (window);
  return TRUE;
}

void
meta_window_stick (MetaWindow  *window)
{
  gboolean stick = TRUE;

  g_return_if_fail (!window->override_redirect);

  window_stick_impl (window);
  meta_window_foreach_transient (window,
                                 stick_foreach_func,
                                 &stick);
}

void
meta_window_unstick (MetaWindow  *window)
{
  gboolean stick = FALSE;

  g_return_if_fail (!window->override_redirect);

  window_unstick_impl (window);
  meta_window_foreach_transient (window,
                                 stick_foreach_func,
                                 &stick);
}

void
meta_window_current_workspace_changed (MetaWindow *window)
{
  META_WINDOW_GET_CLASS (window)->current_workspace_changed (window);
}

static gboolean
find_root_ancestor (MetaWindow *window,
                    void       *data)
{
  MetaWindow **ancestor = data;

  /* Overwrite the previously "most-root" ancestor with the new one found */
  *ancestor = window;

  /* We want this to continue until meta_window_foreach_ancestor quits because
   * there are no more valid ancestors.
   */
  return TRUE;
}

/**
 * meta_window_find_root_ancestor:
 * @window: a #MetaWindow
 *
 * Follow the chain of parents of @window, skipping transient windows,
 * and return the "root" window which has no non-transient parent.
 *
 * Returns: (transfer none): The root ancestor window
 */
MetaWindow *
meta_window_find_root_ancestor (MetaWindow *window)
{
  MetaWindow *ancestor;
  ancestor = window;
  meta_window_foreach_ancestor (window, find_root_ancestor, &ancestor);
  return ancestor;
}

void
meta_window_raise (MetaWindow  *window)
{
  MetaWindow *ancestor;

  g_return_if_fail (!window->override_redirect);

  ancestor = meta_window_find_root_ancestor (window);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Raising window %s, ancestor of %s\n",
              ancestor->desc, window->desc);

  /* Raise the ancestor of the window (if the window has no ancestor,
   * then ancestor will be set to the window itself); do this because
   * it's weird to see windows from other apps stacked between a child
   * and parent window of the currently active app.  The stacking
   * constraints in stack.c then magically take care of raising all
   * the child windows appropriately.
   */
  if (window->screen->stack == ancestor->screen->stack)
    {
      meta_stack_raise (window->screen->stack, ancestor);
      MetaWindow* target = meta_stack_get_above (window->screen->stack,
              window, TRUE);
      if (target != NULL && !target->unmanaging && target->transient_for == window)
        {
           if (target->type == META_WINDOW_MODAL_DIALOG)
            {
              meta_verbose ("unable to operate\n");
              g_signal_emit_by_name (window->display, "unable-to-operate",
                      window);
            }
        }
    }
  else
    {
      meta_warning (
                    "Either stacks aren't per screen or some window has a weird "
                    "transient_for hint; window->screen->stack != "
                    "ancestor->screen->stack.  window = %s, ancestor = %s.\n",
                    window->desc, ancestor->desc);
      /* We could raise the window here, but don't want to do that twice and
       * so we let the case below handle that.
       */
    }

  /* Okay, so stacking constraints misses one case: If a window has
   * two children and we want to raise one of those children, then
   * raising the ancestor isn't enough; we need to also raise the
   * correct child.  See bug 307875.
   */
  if (window != ancestor)
    meta_stack_raise (window->screen->stack, window);

  g_signal_emit (window, window_signals[RAISED], 0);
}

void
meta_window_lower (MetaWindow  *window)
{
  g_return_if_fail (!window->override_redirect);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Lowering window %s\n", window->desc);

  meta_stack_lower (window->screen->stack, window);
}

/*
 * Move window to the requested workspace; append controls whether new WS
 * should be created if one does not exist.
 */
void
meta_window_change_workspace_by_index (MetaWindow *window,
                                       gint        space_index,
                                       gboolean    append)
{
  MetaWorkspace *workspace;
  MetaScreen    *screen;

  g_return_if_fail (!window->override_redirect);

  if (space_index == -1)
    {
      meta_window_stick (window);
      return;
    }

  screen = window->screen;

  workspace =
    meta_screen_get_workspace_by_index (screen, space_index);

  if (!workspace && append)
    workspace = meta_screen_append_new_workspace (screen, FALSE, CurrentTime);

  if (workspace)
    meta_window_change_workspace (window, workspace);
}

static void
meta_window_appears_focused_changed (MetaWindow *window)
{
  set_net_wm_state (window);
  meta_window_frame_size_changed (window);

  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_APPEARS_FOCUSED]);

  if (window->frame)
    meta_frame_queue_draw (window->frame);
}

static gboolean
should_propagate_focus_appearance (MetaWindow *window)
{
  /* Parents of attached modal dialogs should appear focused. */
  if (meta_window_is_attached_dialog (window))
    return TRUE;

  /* Parents of these sorts of override-redirect windows should
   * appear focused. */
  switch (window->type)
    {
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_COMBO:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      return TRUE;
    default:
      break;
    }

  return FALSE;
}

/**
 * meta_window_propagate_focus_appearance:
 * @window: the window to start propagating from
 * @focused: %TRUE if @window's ancestors should appear focused,
 *   %FALSE if they should not.
 *
 * Adjusts the value of #MetaWindow:appears-focused on @window's
 * ancestors (but not @window itself). If @focused is %TRUE, each of
 * @window's ancestors will have its %attached_focus_window field set
 * to the current %focus_window. If @focused if %FALSE, each of
 * @window's ancestors will have its %attached_focus_window field
 * cleared if it is currently %focus_window.
 */
static void
meta_window_propagate_focus_appearance (MetaWindow *window,
                                        gboolean    focused)
{
  MetaWindow *child, *parent, *focus_window;

  focus_window = window->display->focus_window;

  child = window;
  parent = meta_window_get_transient_for (child);
  while (parent && (!focused || should_propagate_focus_appearance (child)))
    {
      gboolean child_focus_state_changed;

      if (focused)
        {
          if (parent->attached_focus_window == focus_window)
            break;
          child_focus_state_changed = (parent->attached_focus_window == NULL);
          parent->attached_focus_window = focus_window;
        }
      else
        {
          if (parent->attached_focus_window != focus_window)
            break;
          child_focus_state_changed = (parent->attached_focus_window != NULL);
          parent->attached_focus_window = NULL;
        }

      if (child_focus_state_changed && !parent->has_focus)
        {
          meta_window_appears_focused_changed (parent);
        }

      child = parent;
      parent = meta_window_get_transient_for (child);
    }
}

void
meta_window_set_focused_internal (MetaWindow *window,
                                  gboolean    focused)
{
  if (focused)
    {
      window->has_focus = TRUE;
      if (window->override_redirect)
        return;

      /* Move to the front of the focusing workspace's MRU list.
       * We should only be "removing" it from the MRU list if it's
       * not already there.  Note that it's possible that we might
       * be processing this FocusIn after we've changed to a
       * different workspace; we should therefore update the MRU
       * list only if the window is actually on the active
       * workspace.
       */
      if (window->screen->active_workspace &&
          meta_window_located_on_workspace (window,
                                            window->screen->active_workspace))
        {
          GList* link;
          link = g_list_find (window->screen->active_workspace->mru_list,
                              window);
          g_assert (link);

          window->screen->active_workspace->mru_list =
            g_list_remove_link (window->screen->active_workspace->mru_list,
                                link);
          g_list_free (link);

          window->screen->active_workspace->mru_list =
            g_list_prepend (window->screen->active_workspace->mru_list,
                            window);
        }

      if (window->frame)
        meta_frame_queue_draw (window->frame);

      /* move into FOCUSED_WINDOW layer */
      meta_window_update_layer (window);

      /* Ungrab click to focus button since the sync grab can interfere
       * with some things you might do inside the focused window, by
       * causing the client to get funky enter/leave events.
       *
       * The reason we usually have a passive grab on the window is
       * so that we can intercept clicks and raise the window in
       * response. For click-to-focus we don't need that since the
       * focused window is already raised. When raise_on_click is
       * FALSE we also don't need that since we don't do anything
       * when the window is clicked.
       *
       * There is dicussion in bugs 102209, 115072, and 461577
       */
      if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK ||
          !meta_prefs_get_raise_on_click())
        meta_display_ungrab_focus_window_button (window->display, window);

      g_signal_emit (window, window_signals[FOCUS], 0);

      if (!window->attached_focus_window)
        meta_window_appears_focused_changed (window);

      meta_window_propagate_focus_appearance (window, TRUE);
    }
  else
    {
      window->has_focus = FALSE;
      if (window->override_redirect)
        return;

      meta_window_propagate_focus_appearance (window, FALSE);

      if (!window->attached_focus_window)
        meta_window_appears_focused_changed (window);

      /* move out of FOCUSED_WINDOW layer */
      meta_window_update_layer (window);

      /* Re-grab for click to focus and raise-on-click, if necessary */
      if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK ||
          !meta_prefs_get_raise_on_click ())
        meta_display_grab_focus_window_button (window->display, window);
    }
}

/**
 * meta_window_get_icon_geometry:
 * @window: a #MetaWindow
 * @rect: (out): rectangle into which to store the returned geometry.
 *
 * Gets the location of the icon corresponding to the window. The location
 * will be provided set by the task bar or other user interface element
 * displaying the icon, and is relative to the root window.
 *
 * Return value: %TRUE if the icon geometry was succesfully retrieved.
 */
gboolean
meta_window_get_icon_geometry (MetaWindow    *window,
                               MetaRectangle *rect)
{
  g_return_val_if_fail (!window->override_redirect, FALSE);

  if (window->icon_geometry_set)
    {
      if (rect)
        *rect = window->icon_geometry;

      return TRUE;
    }

  return FALSE;
}

/**
 * meta_window_set_icon_geometry:
 * @window: a #MetaWindow
 * @rect: (nullable): rectangle with the desired geometry or %NULL.
 *
 * Sets or unsets the location of the icon corresponding to the window. If
 * set, the location should correspond to a dock, task bar or other user
 * interface element displaying the icon, and is relative to the root window.
 */
void
meta_window_set_icon_geometry (MetaWindow    *window,
                               MetaRectangle *rect)
{
  if (rect)
    {
      window->icon_geometry = *rect;
      window->icon_geometry_set = TRUE;
    }
  else
    {
      window->icon_geometry_set = FALSE;
    }
}

static void
redraw_icon (MetaWindow *window)
{
  /* We could probably be smart and just redraw the icon here,
   * instead of the whole frame.
   */
  if (window->frame)
    meta_frame_queue_draw (window->frame);
}

static cairo_surface_t *
load_default_window_icon (int size)
{
  GtkIconTheme *theme = gtk_icon_theme_get_default ();
  GdkPixbuf *pixbuf;
  const char *icon_name;

  if (gtk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME))
    icon_name = META_DEFAULT_ICON_NAME;
  else
    icon_name = "image-missing";

  pixbuf = gtk_icon_theme_load_icon (theme, icon_name, size, 0, NULL);
  return gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
}

static cairo_surface_t *
get_default_window_icon (void)
{
  static cairo_surface_t *default_icon = NULL;

  if (default_icon == NULL)
    {
      default_icon = load_default_window_icon (META_ICON_WIDTH);
      g_assert (default_icon);
    }

  return cairo_surface_reference (default_icon);
}

static cairo_surface_t *
get_default_mini_icon (void)
{
  static cairo_surface_t *default_icon = NULL;

  if (default_icon == NULL)
    {
      default_icon = load_default_window_icon (META_MINI_ICON_WIDTH);
      g_assert (default_icon);
    }

  return cairo_surface_reference (default_icon);
}

static void
meta_window_update_icon_now (MetaWindow *window,
                             gboolean    force)
{
  gboolean changed;
  cairo_surface_t *icon = NULL;
  cairo_surface_t *mini_icon;

  g_return_if_fail (!window->override_redirect);

  changed = META_WINDOW_GET_CLASS (window)->update_icon (window, &icon, &mini_icon);

  if (changed || force)
    {
      if (window->icon)
        cairo_surface_destroy (window->icon);
      if (icon)
        window->icon = icon;
      else
        window->icon = get_default_window_icon ();

      if (window->mini_icon)
        cairo_surface_destroy (window->mini_icon);
      if (mini_icon)
        window->mini_icon = mini_icon;
      else
        window->mini_icon = get_default_mini_icon ();

      g_object_freeze_notify (G_OBJECT (window));
      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_ICON]);
      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_MINI_ICON]);
      g_object_thaw_notify (G_OBJECT (window));

      redraw_icon (window);
    }

  g_assert (window->icon);
  g_assert (window->mini_icon);
}

static gboolean
idle_update_icon (gpointer data)
{
  GSList *tmp;
  GSList *copy;
  guint queue_index = GPOINTER_TO_INT (data);

  meta_topic (META_DEBUG_GEOMETRY, "Clearing the update_icon queue\n");

  /* Work with a copy, for reentrancy. The allowed reentrancy isn't
   * complete; destroying a window while we're in here would result in
   * badness. But it's OK to queue/unqueue update_icons.
   */
  copy = g_slist_copy (queue_pending[queue_index]);
  g_slist_free (queue_pending[queue_index]);
  queue_pending[queue_index] = NULL;
  queue_later[queue_index] = 0;

  destroying_windows_disallowed += 1;

  tmp = copy;
  while (tmp != NULL)
    {
      MetaWindow *window;

      window = tmp->data;

      meta_window_update_icon_now (window, FALSE);
      window->is_in_queues &= ~META_QUEUE_UPDATE_ICON;

      tmp = tmp->next;
    }

  g_slist_free (copy);

  destroying_windows_disallowed -= 1;

  return FALSE;
}

GList*
meta_window_get_workspaces (MetaWindow *window)
{
  if (window->on_all_workspaces)
    return window->screen->workspaces;
  else if (window->workspace != NULL)
    return window->workspace->list_containing_self;
  else if (window->constructing)
    return NULL;
  else
    g_assert_not_reached ();
}

static void
invalidate_work_areas (MetaWindow *window)
{
  GList *tmp;

  tmp = meta_window_get_workspaces (window);

  while (tmp != NULL)
    {
      meta_workspace_invalidate_work_area (tmp->data);
      tmp = tmp->next;
    }
}

void
meta_window_update_struts (MetaWindow *window)
{
  if (META_WINDOW_GET_CLASS (window)->update_struts (window))
    invalidate_work_areas (window);
}

static void
meta_window_type_changed (MetaWindow *window)
{
  gboolean old_decorated = window->decorated;
  GObject  *object = G_OBJECT (window);

  window->attached = meta_window_should_attach_to_parent (window);
  meta_window_recalc_features (window);

  if (!window->override_redirect)
    set_net_wm_state (window);

  /* Update frame */
  if (window->decorated)
    meta_window_ensure_frame (window);
  else
    meta_window_destroy_frame (window);

  /* update stacking constraints */
  meta_window_update_layer (window);

  meta_window_grab_keys (window);

  g_object_freeze_notify (object);

  if (old_decorated != window->decorated)
    g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_DECORATED]);

  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_WINDOW_TYPE]);

  g_object_thaw_notify (object);
}

void
meta_window_set_type (MetaWindow     *window,
                      MetaWindowType  type)
{
  if (window->type == type)
    return;

  window->type = type;
  meta_window_type_changed (window);
}

void
meta_window_frame_size_changed (MetaWindow *window)
{
  if (window->frame)
    meta_frame_clear_cached_borders (window->frame);
}

static void
meta_window_get_default_skip_hints (MetaWindow *window,
                                    gboolean   *skip_taskbar_out,
                                    gboolean   *skip_pager_out)
{
  META_WINDOW_GET_CLASS (window)->get_default_skip_hints (window, skip_taskbar_out, skip_pager_out);
}

static void
meta_window_recalc_skip_features (MetaWindow *window)
{
  switch (window->type)
    {
      /* Force skip taskbar/pager on these window types */
    case META_WINDOW_DESKTOP:
    case META_WINDOW_DOCK:
    case META_WINDOW_TOOLBAR:
    case META_WINDOW_MENU:
    case META_WINDOW_UTILITY:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      window->skip_taskbar = TRUE;
      window->skip_pager = TRUE;
      break;

    case META_WINDOW_DIALOG:
    case META_WINDOW_MODAL_DIALOG:
      /* only skip taskbar if we have a real transient parent
         (and ignore the application hints) */
      if (window->transient_for != NULL)
        window->skip_taskbar = TRUE;
      else
        window->skip_taskbar = FALSE;
      break;

    case META_WINDOW_NORMAL:
      {
        gboolean skip_taskbar_hint, skip_pager_hint;
        meta_window_get_default_skip_hints (window, &skip_taskbar_hint, &skip_pager_hint);
        window->skip_taskbar = skip_taskbar_hint;
        window->skip_pager = skip_pager_hint;
      }
      break;
    }
}

void
meta_window_recalc_features (MetaWindow *window)
{
  gboolean old_has_close_func;
  gboolean old_has_minimize_func;
  gboolean old_has_move_func;
  gboolean old_has_resize_func;
  gboolean old_has_shade_func;
  gboolean old_always_sticky;
  gboolean old_skip_taskbar;

  old_has_close_func = window->has_close_func;
  old_has_minimize_func = window->has_minimize_func;
  old_has_move_func = window->has_move_func;
  old_has_resize_func = window->has_resize_func;
  old_has_shade_func = window->has_shade_func;
  old_always_sticky = window->always_sticky;
  old_skip_taskbar = window->skip_taskbar;

  /* Use MWM hints initially */
  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    window->decorated = window->mwm_decorated;
  else
    window->decorated = FALSE;
  window->border_only = window->mwm_border_only;
  window->has_close_func = window->mwm_has_close_func;
  window->has_minimize_func = window->mwm_has_minimize_func;
  window->has_maximize_func = window->mwm_has_maximize_func;
  window->has_move_func = window->mwm_has_move_func;

  window->has_resize_func = TRUE;

  /* If min_size == max_size, then don't allow resize */
  if (window->size_hints.min_width == window->size_hints.max_width &&
      window->size_hints.min_height == window->size_hints.max_height)
    window->has_resize_func = FALSE;
  else if (!window->mwm_has_resize_func)
    {
      /* We ignore mwm_has_resize_func because WM_NORMAL_HINTS is the
       * authoritative source for that info. Some apps such as mplayer or
       * xine disable resize via MWM but not WM_NORMAL_HINTS, but that
       * leads to e.g. us not fullscreening their windows.  Apps that set
       * MWM but not WM_NORMAL_HINTS are basically broken. We complain
       * about these apps but make them work.
       */

      meta_warning ("Window %s sets an MWM hint indicating it isn't resizable, but sets min size %d x %d and max size %d x %d; this doesn't make much sense.\n",
                    window->desc,
                    window->size_hints.min_width,
                    window->size_hints.min_height,
                    window->size_hints.max_width,
                    window->size_hints.max_height);
    }

  window->has_shade_func = TRUE;
  window->has_fullscreen_func = TRUE;

  window->always_sticky = FALSE;

  /* Semantic category overrides the MWM hints */
  if (window->type == META_WINDOW_TOOLBAR)
    window->decorated = FALSE;

  if (window->type == META_WINDOW_DESKTOP ||
      window->type == META_WINDOW_DOCK ||
      window->override_redirect)
    window->always_sticky = TRUE;

  if (window->override_redirect ||
      meta_window_get_frame_type (window) == META_FRAME_TYPE_LAST)
    {
      window->decorated = FALSE;
      window->has_close_func = FALSE;
      window->has_shade_func = FALSE;

      /* FIXME this keeps panels and things from using
       * NET_WM_MOVERESIZE; the problem is that some
       * panels (edge panels) have fixed possible locations,
       * and others ("floating panels") do not.
       *
       * Perhaps we should require edge panels to explicitly
       * disable movement?
       */
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
    }

  if (window->type != META_WINDOW_NORMAL)
    {
      window->has_minimize_func = FALSE;
      window->has_maximize_func = FALSE;
      window->has_fullscreen_func = FALSE;
    }

  if (!window->has_resize_func)
    {
      window->has_maximize_func = FALSE;

      /* don't allow fullscreen if we can't resize, unless the size
       * is entire screen size (kind of broken, because we
       * actually fullscreen to monitor size not screen size)
       */
      if (window->size_hints.min_width == window->screen->rect.width &&
          window->size_hints.min_height == window->screen->rect.height)
        ; /* leave fullscreen available */
      else
        window->has_fullscreen_func = FALSE;
    }

  /* We leave fullscreen windows decorated, just push the frame outside
   * the screen. This avoids flickering to unparent them.
   *
   * Note that setting has_resize_func = FALSE here must come after the
   * above code that may disable fullscreen, because if the window
   * is not resizable purely due to fullscreen, we don't want to
   * disable fullscreen mode.
   */
  if (window->fullscreen)
    {
      window->has_shade_func = FALSE;
      window->has_move_func = FALSE;
      window->has_resize_func = FALSE;
      window->has_maximize_func = FALSE;
    }

  if (window->has_maximize_func)
    {
      MetaRectangle work_area, client_rect;

      meta_window_get_work_area_current_monitor (window, &work_area);
      meta_window_frame_rect_to_client_rect (window, &work_area, &client_rect);

      if (window->size_hints.min_width >= client_rect.width ||
          window->size_hints.min_height >= client_rect.height)
        window->has_maximize_func = FALSE;
    }

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Window %s fullscreen = %d not resizable, maximizable = %d fullscreenable = %d min size %dx%d max size %dx%d\n",
              window->desc,
              window->fullscreen,
              window->has_maximize_func, window->has_fullscreen_func,
              window->size_hints.min_width,
              window->size_hints.min_height,
              window->size_hints.max_width,
              window->size_hints.max_height);

  /* no shading if not decorated */
  if (!window->decorated || window->border_only)
    window->has_shade_func = FALSE;

  meta_window_recalc_skip_features (window);

  /* To prevent users from losing windows, let's prevent users from
   * minimizing skip-taskbar windows through the window decorations. */
  if (window->skip_taskbar)
    window->has_minimize_func = FALSE;

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Window %s decorated = %d border_only = %d has_close = %d has_minimize = %d has_maximize = %d has_move = %d has_shade = %d skip_taskbar = %d skip_pager = %d\n",
              window->desc,
              window->decorated,
              window->border_only,
              window->has_close_func,
              window->has_minimize_func,
              window->has_maximize_func,
              window->has_move_func,
              window->has_shade_func,
              window->skip_taskbar,
              window->skip_pager);

  if (old_skip_taskbar != window->skip_taskbar)
    g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_SKIP_TASKBAR]);

  /* FIXME:
   * Lame workaround for recalc_features being used overzealously.
   * The fix is to only recalc_features when something has
   * actually changed.
   */
  if (window->constructing                               ||
      old_has_close_func != window->has_close_func       ||
      old_has_minimize_func != window->has_minimize_func ||
      old_has_move_func != window->has_move_func         ||
      old_has_resize_func != window->has_resize_func     ||
      old_has_shade_func != window->has_shade_func       ||
      old_always_sticky != window->always_sticky)
    set_allowed_actions_hint (window);

  if (window->has_resize_func != old_has_resize_func)
    g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_RESIZEABLE]);

  meta_window_frame_size_changed (window);

  /* FIXME perhaps should ensure if we don't have a shade func,
   * we aren't shaded, etc.
   */
}

void
meta_window_show_menu (MetaWindow         *window,
                       MetaWindowMenuType  menu,
                       int                 x,
                       int                 y)
{
  g_return_if_fail (!window->override_redirect);
  meta_compositor_show_window_menu (window->display->compositor, window, menu, x, y);
}

void
meta_window_show_menu_for_rect (MetaWindow         *window,
                                MetaWindowMenuType  menu,
                                MetaRectangle      *rect)
{
  g_return_if_fail (!window->override_redirect);
  meta_compositor_show_window_menu_for_rect (window->display->compositor, window, menu, rect);
}

void
meta_window_shove_titlebar_onscreen (MetaWindow *window)
{
  MetaRectangle  frame_rect;
  GList         *onscreen_region;
  int            horiz_amount, vert_amount;

  g_return_if_fail (!window->override_redirect);

  /* If there's no titlebar, don't bother */
  if (!window->frame)
    return;

  /* Get the basic info we need */
  meta_window_get_frame_rect (window, &frame_rect);
  onscreen_region = window->screen->active_workspace->screen_region;

  /* Extend the region (just in case the window is too big to fit on the
   * screen), then shove the window on screen, then return the region to
   * normal.
   */
  horiz_amount = frame_rect.width;
  vert_amount  = frame_rect.height;
  meta_rectangle_expand_region (onscreen_region,
                                horiz_amount,
                                horiz_amount,
                                0,
                                vert_amount);
  meta_rectangle_shove_into_region(onscreen_region,
                                   FIXED_DIRECTION_X,
                                   &frame_rect);
  meta_rectangle_expand_region (onscreen_region,
                                -horiz_amount,
                                -horiz_amount,
                                0,
                                -vert_amount);

  meta_window_move_frame (window, FALSE, frame_rect.x, frame_rect.y);
}

gboolean
meta_window_titlebar_is_onscreen (MetaWindow *window)
{
  MetaRectangle  titlebar_rect, frame_rect;
  GList         *onscreen_region;
  gboolean       is_onscreen;

  const int min_height_needed  = 8;
  const float min_width_percent  = 0.5;
  const int min_width_absolute = 50;

  /* Titlebar can't be offscreen if there is no titlebar... */
  if (!window->frame)
    return TRUE;

  /* Get the rectangle corresponding to the titlebar */
  meta_window_get_titlebar_rect (window, &titlebar_rect);

  /* Translate into screen coordinates */
  meta_window_get_frame_rect (window, &frame_rect);
  titlebar_rect.x = frame_rect.x;
  titlebar_rect.y = frame_rect.y;

  /* Run through the spanning rectangles for the screen and see if one of
   * them overlaps with the titlebar sufficiently to consider it onscreen.
   */
  is_onscreen = FALSE;
  onscreen_region = window->screen->active_workspace->screen_region;
  while (onscreen_region)
    {
      MetaRectangle *spanning_rect = onscreen_region->data;
      MetaRectangle overlap;

      meta_rectangle_intersect (&titlebar_rect, spanning_rect, &overlap);
      if (overlap.height > MIN (titlebar_rect.height, min_height_needed) &&
          overlap.width  > MIN (titlebar_rect.width * min_width_percent,
                                min_width_absolute))
        {
          is_onscreen = TRUE;
          break;
        }

      onscreen_region = onscreen_region->next;
    }

  return is_onscreen;
}

static double
timeval_to_ms (const GTimeVal *timeval)
{
  return (timeval->tv_sec * G_USEC_PER_SEC + timeval->tv_usec) / 1000.0;
}

static double
time_diff (const GTimeVal *first,
	   const GTimeVal *second)
{
  double first_ms = timeval_to_ms (first);
  double second_ms = timeval_to_ms (second);

  return first_ms - second_ms;
}

static gboolean
check_moveresize_frequency (MetaWindow *window,
			    gdouble    *remaining)
{
  GTimeVal current_time;
  const double max_resizes_per_second = 25.0;
  const double ms_between_resizes = 1000.0 / max_resizes_per_second;
  double elapsed;

  g_get_current_time (&current_time);

  /* If we are throttling via _NET_WM_SYNC_REQUEST, we don't need
   * an artificial timeout-based throttled */
  if (!window->disable_sync &&
      window->sync_request_alarm != None)
    return TRUE;

  elapsed = time_diff (&current_time, &window->display->grab_last_moveresize_time);

  if (elapsed >= 0.0 && elapsed < ms_between_resizes)
    {
      meta_topic (META_DEBUG_RESIZING,
                  "Delaying move/resize as only %g of %g ms elapsed\n",
                  elapsed, ms_between_resizes);

      if (remaining)
        *remaining = (ms_between_resizes - elapsed);

      return FALSE;
    }

  meta_topic (META_DEBUG_RESIZING,
              " Checked moveresize freq, allowing move/resize now (%g of %g seconds elapsed)\n",
              elapsed / 1000.0, 1.0 / max_resizes_per_second);

  return TRUE;
}

static gboolean
update_move_timeout (gpointer data)
{
  MetaWindow *window = data;

  update_move (window,
               window->display->grab_last_user_action_was_snap,
               window->display->grab_latest_motion_x,
               window->display->grab_latest_motion_y);

  return FALSE;
}

static void
update_move (MetaWindow  *window,
             gboolean     snap,
             int          x,
             int          y)
{
  int dx, dy;
  int new_x, new_y;
  MetaRectangle old;
  int shake_threshold;
  MetaDisplay *display = window->display;

  display->grab_latest_motion_x = x;
  display->grab_latest_motion_y = y;

  dx = x - display->grab_anchor_root_x;
  dy = y - display->grab_anchor_root_y;

  new_x = display->grab_anchor_window_pos.x + dx;
  new_y = display->grab_anchor_window_pos.y + dy;

  meta_verbose ("x,y = %d,%d anchor ptr %d,%d anchor pos %d,%d dx,dy %d,%d\n",
                x, y,
                display->grab_anchor_root_x,
                display->grab_anchor_root_y,
                display->grab_anchor_window_pos.x,
                display->grab_anchor_window_pos.y,
                dx, dy);

  /* Don't bother doing anything if no move has been specified.  (This
   * happens often, even in keyboard moving, due to the warping of the
   * pointer.
   */
  if (dx == 0 && dy == 0)
    return;

  /* Originally for detaching maximized windows, but we use this
   * for the zones at the sides of the monitor where trigger tiling
   * because it's about the right size
   */
#define DRAG_THRESHOLD_TO_SHAKE_THRESHOLD_FACTOR 6
  shake_threshold = meta_prefs_get_drag_threshold () *
    DRAG_THRESHOLD_TO_SHAKE_THRESHOLD_FACTOR;

  if (snap)
    {
      /* We don't want to tile while snapping. Also, clear any previous tile
         request. */
      window->tile_mode = META_TILE_NONE;
      window->tile_monitor_number = -1;
      meta_window_compute_tile_counterpart (window);
    }
  else if (meta_prefs_get_edge_tiling () &&
           !META_WINDOW_MAXIMIZED (window) &&
           !META_WINDOW_TILED_SIDE_BY_SIDE (window))
    {
      const MetaMonitorInfo *monitor;
      MetaRectangle work_area;

      /* For side-by-side tiling we are interested in the inside vertical
       * edges of the work area of the monitor where the pointer is located,
       * and in the outside top edge for maximized tiling.
       *
       * For maximized tiling we use the outside edge instead of the
       * inside edge, because we don't want to force users to maximize
       * windows they are placing near the top of their screens.
       *
       * The "current" idea of meta_window_get_work_area_current_monitor() and
       * meta_screen_get_current_monitor() is slightly different: the former
       * refers to the monitor which contains the largest part of the window,
       * the latter to the one where the pointer is located.
       */
      monitor = meta_screen_get_current_monitor_info_for_pos (window->screen, x, y);
      meta_window_get_work_area_for_monitor (window,
                                             monitor->number,
                                             &work_area);

      /* Check if the cursor is in a position which triggers tiling
       * and set tile_mode accordingly.
       */
      if (meta_window_can_tile_side_by_side (window) &&
          x >= monitor->rect.x && x < (work_area.x + shake_threshold))
        window->tile_mode = META_TILE_LEFT;
      else if (meta_window_can_tile_side_by_side (window) &&
               x >= work_area.x + work_area.width - shake_threshold &&
               x < (monitor->rect.x + monitor->rect.width))
        window->tile_mode = META_TILE_RIGHT;
      else if (meta_window_can_tile_maximized (window) &&
               y >= monitor->rect.y && y <= work_area.y)
        window->tile_mode = META_TILE_MAXIMIZED;
      else
        window->tile_mode = META_TILE_NONE;

      if (meta_screen_has_tiled_window_for_monitor (window->tile_mode, window))
        {
          meta_verbose ("another window is tiled in the same mode, disallow this request");
          window->tile_mode = META_TILE_NONE;
        }

      if (window->tile_mode != META_TILE_NONE)
        window->tile_monitor_number = monitor->number;

      meta_window_compute_tile_counterpart (window);
    }

  /* shake loose (unmaximize) maximized or tiled window if dragged beyond
   * the threshold in the Y direction. Tiled windows can also be pulled
   * loose via X motion.
   */

  if ((META_WINDOW_MAXIMIZED (window) && ABS (dy) >= shake_threshold) ||
      (META_WINDOW_TILED_SIDE_BY_SIDE (window) && (MAX (ABS (dx), ABS (dy)) >= shake_threshold)))
    {
      double prop;

      /* Shake loose, so that the window snaps back to maximized
       * when dragged near the top; do not snap back if tiling
       * is enabled, as top edge tiling can be used in that case
       */
      window->shaken_loose = !meta_prefs_get_edge_tiling ();
      window->tile_mode = META_TILE_NONE;
      meta_window_compute_tile_counterpart (window);

      /* move the unmaximized window to the cursor */
      prop =
        ((double)(x - display->grab_initial_window_pos.x)) /
        ((double)display->grab_initial_window_pos.width);

      display->grab_initial_window_pos.x = x - window->saved_rect.width * prop;

      /* If we started dragging the window from above the top of the window,
       * pretend like we started dragging from the middle of the titlebar
       * instead, as the "correct" anchoring looks wrong. */
      if (display->grab_anchor_root_y < display->grab_initial_window_pos.y)
        {
          MetaRectangle titlebar_rect;
          meta_window_get_titlebar_rect (window, &titlebar_rect);
          display->grab_anchor_root_y = display->grab_initial_window_pos.y + titlebar_rect.height / 2;
        }

      window->saved_rect.x = display->grab_initial_window_pos.x;
      window->saved_rect.y = display->grab_initial_window_pos.y;

      meta_window_unmaximize (window, META_MAXIMIZE_BOTH);
      return;
    }

  /* remaximize window on another monitor if window has been shaken
   * loose or it is still maximized (then move straight)
   */
  else if ((window->shaken_loose || META_WINDOW_MAXIMIZED (window)) &&
           window->tile_mode != META_TILE_LEFT && window->tile_mode != META_TILE_RIGHT)
    {
      const MetaMonitorInfo *wmonitor;
      MetaRectangle work_area;
      int monitor;

      window->tile_mode = META_TILE_NONE;
      meta_window_compute_tile_counterpart (window);
      wmonitor = window->monitor;

      for (monitor = 0; monitor < window->screen->n_monitor_infos; monitor++)
        {
          meta_window_get_work_area_for_monitor (window, monitor, &work_area);

          /* check if cursor is near the top of a monitor work area */
          if (x >= work_area.x &&
              x < (work_area.x + work_area.width) &&
              y >= work_area.y &&
              y < (work_area.y + shake_threshold))
            {
              /* move the saved rect if window will become maximized on an
               * other monitor so user isn't surprised on a later unmaximize
               */
              if (wmonitor->number != monitor)
                {
                  window->saved_rect.x = work_area.x;
                  window->saved_rect.y = work_area.y;

                  if (window->frame)
                    {
                      window->saved_rect.x += window->frame->child_x;
                      window->saved_rect.y += window->frame->child_y;
                    }

                  window->unconstrained_rect.x = window->saved_rect.x;
                  window->unconstrained_rect.y = window->saved_rect.y;

                  meta_window_unmaximize (window, META_MAXIMIZE_BOTH);

                  display->grab_initial_window_pos = work_area;
                  display->grab_anchor_root_x = x;
                  display->grab_anchor_root_y = y;
                  window->shaken_loose = FALSE;

                  meta_window_maximize (window, META_MAXIMIZE_BOTH);
                }

              return;
            }
        }
    }

  /* Delay showing the tile preview slightly to make it more unlikely to
   * trigger it unwittingly, e.g. when shaking loose the window or moving
   * it to another monitor.
   */
  meta_screen_update_tile_preview (window->screen,
                                   window->tile_mode != META_TILE_NONE);

  meta_window_get_frame_rect (window, &old);

  /* Don't allow movement in the maximized directions or while tiled */
  if (window->maximized_horizontally || META_WINDOW_TILED_SIDE_BY_SIDE (window))
    new_x = old.x;
  if (window->maximized_vertically)
    new_y = old.y;

  /* Do any edge resistance/snapping */
  meta_window_edge_resistance_for_move (window,
                                        &new_x,
                                        &new_y,
                                        update_move_timeout,
                                        snap,
                                        FALSE);

  meta_window_move_frame (window, TRUE, new_x, new_y);
}

static gboolean
update_resize_timeout (gpointer data)
{
  MetaWindow *window = data;

  update_resize (window,
                 window->display->grab_last_user_action_was_snap,
                 window->display->grab_latest_motion_x,
                 window->display->grab_latest_motion_y,
                 TRUE);
  return FALSE;
}

static void
update_resize (MetaWindow *window,
               gboolean    snap,
               int x, int y,
               gboolean force)
{
  int dx, dy;
  int new_w, new_h;
  int gravity;
  MetaRectangle old;
  double remaining = 0;
  gboolean check_counterpart = FALSE;
  MetaRectangle tile_area;

  window->display->grab_latest_motion_x = x;
  window->display->grab_latest_motion_y = y;

  dx = x - window->display->grab_anchor_root_x;
  dy = y - window->display->grab_anchor_root_y;

  /* Attached modal dialogs are special in that size
   * changes apply to both sides, so that the dialog
   * remains centered to the parent.
   */
  if (meta_window_is_attached_dialog (window))
    {
      dx *= 2;
      dy *= 2;
    }

  new_w = window->display->grab_anchor_window_pos.width;
  new_h = window->display->grab_anchor_window_pos.height;

  /* Don't bother doing anything if no move has been specified.  (This
   * happens often, even in keyboard resizing, due to the warping of the
   * pointer.
   */
  if (dx == 0 && dy == 0)
    return;

  if (window->display->grab_op == META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN)
    {
      MetaGrabOp op = META_GRAB_OP_WINDOW_BASE | META_GRAB_OP_WINDOW_FLAG_KEYBOARD;

      if (dx > 0)
        op |= META_GRAB_OP_WINDOW_DIR_EAST;
      else if (dx < 0)
        op |= META_GRAB_OP_WINDOW_DIR_WEST;

      if (dy > 0)
        op |= META_GRAB_OP_WINDOW_DIR_SOUTH;
      else if (dy < 0)
        op |= META_GRAB_OP_WINDOW_DIR_NORTH;

      window->display->grab_op = op;

      meta_window_update_keyboard_resize (window, TRUE);
    }

  if (window->display->grab_op & META_GRAB_OP_WINDOW_DIR_EAST)
    new_w += dx;
  else if (window->display->grab_op & META_GRAB_OP_WINDOW_DIR_WEST)
    new_w -= dx;

  if (window->display->grab_op & META_GRAB_OP_WINDOW_DIR_SOUTH)
    new_h += dy;
  else if (window->display->grab_op & META_GRAB_OP_WINDOW_DIR_NORTH)
    new_h -= dy;

  /* If we're waiting for a request for _NET_WM_SYNC_REQUEST, we'll
   * resize the window when the window responds, or when we time
   * the response out.
   */
  if (window->sync_request_timeout_id != 0)
    return;

  if (!check_moveresize_frequency (window, &remaining) && !force)
    {
      /* we are ignoring an event here, so we schedule a
       * compensation event when we would otherwise not ignore
       * an event. Otherwise we can become stuck if the user never
       * generates another event.
       */
      if (!window->display->grab_resize_timeout_id)
	{
	  window->display->grab_resize_timeout_id =
	    g_timeout_add ((int)remaining, update_resize_timeout, window);
	  g_source_set_name_by_id (window->display->grab_resize_timeout_id,
                                   "[mutter] update_resize_timeout");
	}

      return;
    }

  /* Remove any scheduled compensation events */
  if (window->display->grab_resize_timeout_id)
    {
      g_source_remove (window->display->grab_resize_timeout_id);
      window->display->grab_resize_timeout_id = 0;
    }

  meta_window_get_frame_rect (window, &old);

  /* One sided resizing ought to actually be one-sided, despite the fact that
   * aspect ratio windows don't interact nicely with the above stuff.  So,
   * to avoid some nasty flicker, we enforce that.
   */

  if ((window->display->grab_op & (META_GRAB_OP_WINDOW_DIR_WEST | META_GRAB_OP_WINDOW_DIR_EAST)) == 0)
    new_w = old.width;

  if ((window->display->grab_op & (META_GRAB_OP_WINDOW_DIR_NORTH | META_GRAB_OP_WINDOW_DIR_SOUTH)) == 0)
    new_h = old.height;

  /* compute gravity of client during operation */
  gravity = meta_resize_gravity_from_grab_op (window->display->grab_op);
  g_assert (gravity >= 0);

  /* Do any edge resistance/snapping */
  meta_window_edge_resistance_for_resize (window,
                                          &new_w,
                                          &new_h,
                                          gravity,
                                          update_resize_timeout,
                                          snap,
                                          FALSE);

  // disable it in 15.7
  /*check_counterpart = META_WINDOW_TILED_SIDE_BY_SIDE (window) && window->tile_counterpart;*/
  if (check_counterpart)
    {
      MetaWindow *part = window->tile_counterpart; 
      int tile_monitor_number;

      tile_monitor_number = meta_window_get_current_tile_monitor_number (window);
      meta_window_get_work_area_for_monitor (window, tile_monitor_number, &tile_area);

      if (!(part->minimized || part->shaded || part->hidden))
        {
          MetaRectangle min_rect, max_rect;

          min_rect.width = part->size_hints.min_width;
          min_rect.height = part->size_hints.min_height;
          max_rect.width = part->size_hints.max_width;
          max_rect.height = part->size_hints.max_height;

          meta_window_client_rect_to_frame_rect (part, &min_rect, &min_rect);
          meta_window_client_rect_to_frame_rect (part, &max_rect, &max_rect);

          //TODOE: new_w could be altered by constriants during resize, this may 
          //be not accurate
          if (tile_area.width - new_w < min_rect.width ||
                  tile_area.width - new_w > max_rect.width)
            return;
        }
    }

  meta_window_resize_frame_with_gravity (window, TRUE, new_w, new_h, gravity);

  /* Store the latest resize time, if we actually resized. */
  if (window->rect.width != old.width || window->rect.height != old.height)
    g_get_current_time (&window->display->grab_last_moveresize_time);

  if (check_counterpart)
    {
      MetaWindow *part = window->tile_counterpart; 
      if (part->minimized || part->shaded || part->hidden)
        return;

      if (ABS(part->rect.width + old.width - tile_area.width) >= 8)
        return;

      //TODO: min width constrain
      
      tile_area.width -= window->rect.width;

      meta_window_resize_frame_with_gravity (part, TRUE, tile_area.width, new_h, gravity);
    }

}

static void
update_tile_mode (MetaWindow *window)
{
  switch (window->tile_mode)
    {
      case META_TILE_LEFT:
      case META_TILE_RIGHT:
          if (!META_WINDOW_TILED_SIDE_BY_SIDE (window))
              window->tile_mode = META_TILE_NONE;
          break;
      case META_TILE_MAXIMIZED:
          if (!META_WINDOW_MAXIMIZED (window))
              window->tile_mode = META_TILE_NONE;
          break;
    }
  meta_window_compute_tile_counterpart (window);
}

void
meta_window_update_resize (MetaWindow *window,
                           gboolean    snap,
                           int x, int y,
                           gboolean force)
{
  update_resize (window, snap, x, y, force);
}

static void
end_grab_op (MetaWindow *window,
             const ClutterEvent *event)
{
  ClutterModifierType modifiers;
  gfloat x, y;

  clutter_event_get_coords (event, &x, &y);
  modifiers = clutter_event_get_state (event);
  meta_display_check_threshold_reached (window->display, x, y);

  /* If the user was snap moving then ignore the button
   * release because they may have let go of shift before
   * releasing the mouse button and they almost certainly do
   * not want a non-snapped movement to occur from the button
   * release.
   */
  if (!window->display->grab_last_user_action_was_snap)
    {
      if (meta_grab_op_is_moving (window->display->grab_op))
        {
          if (window->tile_mode != META_TILE_NONE)
            meta_window_tile (window);
          else
            update_move (window,
                         modifiers & CLUTTER_SHIFT_MASK,
                         x, y);
        }
      else if (meta_grab_op_is_resizing (window->display->grab_op))
        {
          update_resize (window,
                         modifiers & CLUTTER_SHIFT_MASK,
                         x, y,
                         TRUE);

          /* If a tiled window has been dragged free with a
           * mouse resize without snapping back to the tiled
           * state, it will end up with an inconsistent tile
           * mode on mouse release; cleaning the mode earlier
           * would break the ability to snap back to the tiled
           * state, so we wait until mouse release.
           */
          update_tile_mode (window);
        }
    }
  meta_display_end_grab_op (window->display, clutter_event_get_time (event));
}

gboolean
meta_window_handle_mouse_grab_op_event  (MetaWindow         *window,
                                         const ClutterEvent *event)
{
  ClutterEventSequence *sequence = clutter_event_get_event_sequence (event);
  ClutterModifierType modifier_state;
  gfloat x, y;

  switch (event->type)
    {
    case CLUTTER_BUTTON_PRESS:
      {
        ClutterModifierType grab_mods = meta_display_get_window_grab_modifiers (window->display);

        /* This is the keybinding or menu case where we've
         * been dragging around the window without the button
         * pressed. */

        if ((meta_grab_op_is_mouse (window->display->grab_op) &&
             (event->button.modifier_state & grab_mods) == grab_mods &&
             window->display->grab_button != (int) event->button.button) ||
            meta_grab_op_is_keyboard (window->display->grab_op))
          {
            meta_verbose("GRAB: %s: CLUTTER_BUTTON_PRESS\n", __func__);
            end_grab_op (window, event);
            return FALSE;
          }
        return TRUE;
      }

    case CLUTTER_TOUCH_END:
      if (meta_display_is_pointer_emulating_sequence (window->display, sequence))
        {
          meta_verbose("GRAB: %s: CLUTTER_TOUCH_END\n", __func__);
          if (!meta_grab_op_is_moving(window->display->grab_op))
            end_grab_op (window, event);
        }

      return TRUE;

    case CLUTTER_BUTTON_RELEASE:
      if (event->button.button == 1 ||
          (meta_grab_op_is_mouse (window->display->grab_op) &&
           window->display->grab_button == (int) event->button.button) ||
          event->button.button == (unsigned int) meta_prefs_get_mouse_button_resize ())
      {
        meta_verbose("GRAB: %s: CLUTTER_BUTTON_RELEASE\n", __func__);
        end_grab_op (window, event);
      }

      return TRUE;

    case CLUTTER_TOUCH_BEGIN:
      meta_verbose ("%s: CLUTTER_TOUCH_BEGIN\n", __func__);
      /* This will only catch the keybinding and menu cases, just deal with this
       * like a CLUTTER_TOUCH_UPDATE rather than a CLUTTER_BUTTON_PRESS, and
       * wait until CLUTTER_TOUCH_END to undo the grab, just so the window
       * doesn't warp below the finger and remain there.
       */
    case CLUTTER_TOUCH_UPDATE:
      meta_verbose ("%s: CLUTTER_TOUCH_UPDATE\n", __func__);
      if (!meta_display_is_pointer_emulating_sequence (window->display, sequence))
        return FALSE;

      /* Fall through */
    case CLUTTER_MOTION:
      meta_verbose ("%s: CLUTTER_MOTION\n", __func__);
      modifier_state = clutter_event_get_state (event);
      clutter_event_get_coords (event, &x, &y);

      meta_display_check_threshold_reached (window->display, x, y);
      if (meta_grab_op_is_moving (window->display->grab_op))
        {
          update_move (window,
                       modifier_state & CLUTTER_SHIFT_MASK,
                       x, y);
        }
      else if (meta_grab_op_is_resizing (window->display->grab_op))
        {
          update_resize (window,
                         modifier_state & CLUTTER_SHIFT_MASK,
                         x, y,
                         FALSE);
        }
      return TRUE;

    default:
      return FALSE;
    }
}

static void
get_work_area_monitor (MetaWindow    *window,
                       MetaRectangle *area,
                       int            which_monitor)
{
  GList *tmp;

  g_assert (which_monitor >= 0);

  /* Initialize to the whole monitor */
  *area = window->screen->monitor_infos[which_monitor].rect;

  tmp = meta_window_get_workspaces (window);
  while (tmp != NULL)
    {
      MetaRectangle workspace_work_area;
      meta_workspace_get_work_area_for_monitor (tmp->data,
                                                which_monitor,
                                                &workspace_work_area);
      meta_rectangle_intersect (area,
                                &workspace_work_area,
                                area);
      tmp = tmp->next;
    }

  meta_topic (META_DEBUG_WORKAREA,
              "Window %s monitor %d has work area %d,%d %d x %d\n",
              window->desc, which_monitor,
              area->x, area->y, area->width, area->height);
}

/**
 * meta_window_get_work_area_current_monitor:
 * @window: a #MetaWindow
 * @area: (out): a location to store the work area
 *
 * Get the work area for the monitor @window is currently on.
 */
void
meta_window_get_work_area_current_monitor (MetaWindow    *window,
                                           MetaRectangle *area)
{
  meta_window_get_work_area_for_monitor (window,
                                         window->monitor->number,
                                         area);
}

/**
 * meta_window_get_work_area_for_monitor:
 * @window: a #MetaWindow
 * @which_monitor: a moniotr to get the work area for
 * @area: (out): a location to store the work area
 *
 * Get the work area for @window, given the monitor index
 * @which_monitor.
 */
void
meta_window_get_work_area_for_monitor (MetaWindow    *window,
                                       int            which_monitor,
                                       MetaRectangle *area)
{
  g_return_if_fail (which_monitor >= 0);

  get_work_area_monitor (window,
                         area,
                         which_monitor);
}

/**
 * meta_window_get_work_area_all_monitors:
 * @window: a #MetaWindow
 * @area: (out): a location to store the work area
 *
 * Get the work area for all monitors for @window.
 */
void
meta_window_get_work_area_all_monitors (MetaWindow    *window,
                                        MetaRectangle *area)
{
  GList *tmp;

  /* Initialize to the whole screen */
  *area = window->screen->rect;

  tmp = meta_window_get_workspaces (window);
  while (tmp != NULL)
    {
      MetaRectangle workspace_work_area;
      meta_workspace_get_work_area_all_monitors (tmp->data,
                                                 &workspace_work_area);
      meta_rectangle_intersect (area,
                                &workspace_work_area,
                                area);
      tmp = tmp->next;
    }

  meta_topic (META_DEBUG_WORKAREA,
              "Window %s has whole-screen work area %d,%d %d x %d\n",
              window->desc, area->x, area->y, area->width, area->height);
}

int
meta_window_get_current_tile_monitor_number (MetaWindow *window)
{
  int tile_monitor_number = window->tile_monitor_number;

  if (tile_monitor_number < 0)
    {
      meta_warning ("%s called with an invalid monitor number; using 0 instead\n", G_STRFUNC);
      tile_monitor_number = 0;
    }

  return tile_monitor_number;
}

void
meta_window_get_current_tile_area (MetaWindow    *window,
                                   MetaRectangle *tile_area)
{
  int tile_monitor_number;

  g_return_if_fail (window->tile_mode != META_TILE_NONE);

  tile_monitor_number = meta_window_get_current_tile_monitor_number (window);

  meta_window_get_work_area_for_monitor (window, tile_monitor_number, tile_area);

  if (window->tile_mode == META_TILE_LEFT  ||
      window->tile_mode == META_TILE_RIGHT)
    tile_area->width /= 2;

  if (window->tile_mode == META_TILE_RIGHT)
    tile_area->x += tile_area->width;
}

void
meta_window_get_current_tile_area_constrianted (MetaWindow    *window,
                                                MetaRectangle *tile_area)
{
  MetaRectangle adjust_rect;
  MetaWindow* counterpart;
  int tile_monitor_number;

  g_return_if_fail (window->tile_mode != META_TILE_NONE);

  tile_monitor_number = meta_window_get_current_tile_monitor_number (window);

  meta_window_get_work_area_for_monitor (window, tile_monitor_number, tile_area);
  adjust_rect = *tile_area;

  if (window->tile_mode == META_TILE_LEFT  ||
      window->tile_mode == META_TILE_RIGHT)
    tile_area->width /= 2;

  counterpart = meta_screen_get_tiled_window_for_monitor (
          (window->tile_mode == META_TILE_LEFT ? META_TILE_RIGHT: META_TILE_LEFT),
          window);

  if (counterpart != NULL)
    {
      if (counterpart->minimized || counterpart->shaded || counterpart->hidden)
        return;

      tile_area->width = adjust_rect.width - counterpart->rect.width;
    }

  if (window->tile_mode == META_TILE_RIGHT)
    tile_area->x += adjust_rect.width - tile_area->width;
}

gboolean
meta_window_same_application (MetaWindow *window,
                              MetaWindow *other_window)
{
  MetaGroup *group       = meta_window_get_group (window);
  MetaGroup *other_group = meta_window_get_group (other_window);

  return
    group!=NULL &&
    other_group!=NULL &&
    group==other_group;
}

/**
 * meta_window_is_client_decorated:
 *
 * Check if if the window has decorations drawn by the client.
 * (window->decorated refers only to whether we should add decorations)
 */
gboolean
meta_window_is_client_decorated (MetaWindow *window)
{
  if (window->client_type == META_WINDOW_CLIENT_TYPE_WAYLAND)
    {
      /* Assume all Wayland clients draw decorations - not strictly
       * true but good enough for current purposes.
       */
      return TRUE;
    }
  else
    {
      /* Currently the implementation here is hackish -
       * has_custom_frame_extents() is set if _GTK_FRAME_EXTENTS is set
       * to any value even 0. GTK+ always sets _GTK_FRAME_EXTENTS for
       * client-side-decorated window, even if the value is 0 because
       * the window is maxized and has no invisible borders or shadows.
       */
      return window->has_custom_frame_extents;
    }
}

/**
 * meta_window_foreach_transient:
 * @window: a #MetaWindow
 * @func: (scope call) (closure user_data): Called for each window which is a transient of @window (transitively)
 * @user_data: User data
 *
 * Call @func for every window which is either transient for @window, or is
 * a transient of a window which is in turn transient for @window.
 * The order of window enumeration is not defined.
 *
 * Iteration will stop if @func at any point returns %FALSE.
 */
void
meta_window_foreach_transient (MetaWindow            *window,
                               MetaWindowForeachFunc  func,
                               void                  *user_data)
{
  GSList *windows;
  GSList *tmp;

  windows = meta_display_list_windows (window->display, META_LIST_DEFAULT);

  tmp = windows;
  while (tmp != NULL)
    {
      MetaWindow *transient = tmp->data;

      if (meta_window_is_ancestor_of_transient (window, transient))
        {
          if (!(* func) (transient, user_data))
            break;
        }

      tmp = tmp->next;
    }

  g_slist_free (windows);
}

/**
 * meta_window_foreach_ancestor:
 * @window: a #MetaWindow
 * @func: (scope call) (closure user_data): Called for each window which is a transient parent of @window
 * @user_data: User data
 *
 * If @window is transient, call @func with the window for which it's transient,
 * repeatedly until either we find a non-transient window, or @func returns %FALSE.
 */
void
meta_window_foreach_ancestor (MetaWindow            *window,
                              MetaWindowForeachFunc  func,
                              void                  *user_data)
{
  MetaWindow *w;

  w = window;
  do
    {
      if (w->transient_for == NULL)
        break;

      w = w->transient_for;
    }
  while (w && (* func) (w, user_data));
}

typedef struct
{
  MetaWindow *ancestor;
  gboolean found;
} FindAncestorData;

static gboolean
find_ancestor_func (MetaWindow *window,
                    void       *data)
{
  FindAncestorData *d = data;

  if (window == d->ancestor)
    {
      d->found = TRUE;
      return FALSE;
    }

  return TRUE;
}

/**
 * meta_window_is_ancestor_of_transient:
 * @window: a #MetaWindow
 * @transient: a #MetaWindow
 *
 * The function determines whether @window is an ancestor of @transient; it does
 * so by traversing the @transient's ancestors until it either locates @window
 * or reaches an ancestor that is not transient.
 *
 * Return Value: %TRUE if window is an ancestor of transient.
 */
gboolean
meta_window_is_ancestor_of_transient (MetaWindow *window,
                                      MetaWindow *transient)
{
  FindAncestorData d;

  d.ancestor = window;
  d.found = FALSE;

  meta_window_foreach_ancestor (transient, find_ancestor_func, &d);

  return d.found;
}

/* Warp pointer to location appropriate for grab,
 * return root coordinates where pointer ended up.
 */
static gboolean
warp_grab_pointer (MetaWindow          *window,
                   MetaGrabOp           grab_op,
                   int                 *x,
                   int                 *y)
{
  MetaRectangle  rect;
  MetaDisplay   *display;

  display = window->display;

  /* We may not have done begin_grab_op yet, i.e. may not be in a grab
   */

  meta_window_get_frame_rect (window, &rect);

  if (grab_op & META_GRAB_OP_WINDOW_DIR_WEST)
    *x = 0;
  else if (grab_op & META_GRAB_OP_WINDOW_DIR_EAST)
    *x = rect.width - 1;
  else
    *x = rect.width / 2;

  if (grab_op & META_GRAB_OP_WINDOW_DIR_NORTH)
    *y = 0;
  else if (grab_op & META_GRAB_OP_WINDOW_DIR_SOUTH)
    *y = rect.height - 1;
  else
    *y = rect.height / 2;

  *x += rect.x;
  *y += rect.y;

  /* Avoid weird bouncing at the screen edge; see bug 154706 */
  *x = CLAMP (*x, 0, window->screen->rect.width-1);
  *y = CLAMP (*y, 0, window->screen->rect.height-1);

  meta_error_trap_push (display);

  meta_topic (META_DEBUG_WINDOW_OPS,
              "Warping pointer to %d,%d with window at %d,%d\n",
              *x, *y, rect.x, rect.y);

  /* Need to update the grab positions so that the MotionNotify and other
   * events generated by the XWarpPointer() call below don't cause complete
   * funkiness.  See bug 124582 and bug 122670.
   */
  display->grab_anchor_root_x = *x;
  display->grab_anchor_root_y = *y;
  display->grab_latest_motion_x = *x;
  display->grab_latest_motion_y = *y;
  meta_window_get_frame_rect (window,
                              &display->grab_anchor_window_pos);

  {
    MetaBackend *backend = meta_get_backend ();
    meta_backend_warp_pointer (backend, *x, *y);
  }

  if (meta_error_trap_pop_with_return (display) != Success)
    {
      meta_verbose ("Failed to warp pointer for window %s\n",
                    window->desc);
      return FALSE;
    }

  return TRUE;
}

void
meta_window_begin_grab_op (MetaWindow *window,
                           MetaGrabOp  op,
                           gboolean    frame_action,
                           guint32     timestamp)
{
  int x, y;

  warp_grab_pointer (window,
                     op, &x, &y);

  meta_display_begin_grab_op (window->display,
                              window->screen,
                              window,
                              op,
                              FALSE,
                              frame_action,
                              0 /* button */,
                              0,
                              timestamp,
                              x, y);
}

void
meta_window_update_keyboard_resize (MetaWindow *window,
                                    gboolean    update_cursor)
{
  int x, y;

  warp_grab_pointer (window,
                     window->display->grab_op,
                     &x, &y);

  if (update_cursor)
    meta_display_update_cursor (window->display);
}

void
meta_window_update_keyboard_move (MetaWindow *window)
{
  int x, y;

  warp_grab_pointer (window,
                     window->display->grab_op,
                     &x, &y);
}

void
meta_window_update_layer (MetaWindow *window)
{
  MetaGroup *group;

  meta_stack_freeze (window->screen->stack);
  group = meta_window_get_group (window);
  if (group)
    meta_group_update_layers (group);
  else
    meta_stack_update_layer (window->screen->stack, window);
  meta_stack_thaw (window->screen->stack);
}

/* ensure_mru_position_after ensures that window appears after
 * below_this_one in the active_workspace's mru_list (i.e. it treats
 * window as having been less recently used than below_this_one)
 */
static void
ensure_mru_position_after (MetaWindow *window,
                           MetaWindow *after_this_one)
{
  /* This is sort of slow since it runs through the entire list more
   * than once (especially considering the fact that we expect the
   * windows of interest to be the first two elements in the list),
   * but it doesn't matter while we're only using it on new window
   * map.
   */

  GList* active_mru_list;
  GList* window_position;
  GList* after_this_one_position;

  active_mru_list         = window->screen->active_workspace->mru_list;
  window_position         = g_list_find (active_mru_list, window);
  after_this_one_position = g_list_find (active_mru_list, after_this_one);

  /* after_this_one_position is NULL when we switch workspaces, but in
   * that case we don't need to do any MRU shuffling so we can simply
   * return.
   */
  if (after_this_one_position == NULL)
    return;

  if (g_list_length (window_position) > g_list_length (after_this_one_position))
    {
      window->screen->active_workspace->mru_list =
        g_list_delete_link (window->screen->active_workspace->mru_list,
                            window_position);

      window->screen->active_workspace->mru_list =
        g_list_insert_before (window->screen->active_workspace->mru_list,
                              after_this_one_position->next,
                              window);
    }
}

void
meta_window_stack_just_below (MetaWindow *window,
                              MetaWindow *below_this_one)
{
  g_return_if_fail (window         != NULL);
  g_return_if_fail (below_this_one != NULL);

  if (window->stack_position > below_this_one->stack_position)
    {
      meta_topic (META_DEBUG_STACK,
                  "Setting stack position of window %s to %d (making it below window %s).\n",
                  window->desc,
                  below_this_one->stack_position,
                  below_this_one->desc);
      meta_window_set_stack_position (window, below_this_one->stack_position);
    }
  else
    {
      meta_topic (META_DEBUG_STACK,
                  "Window %s  was already below window %s.\n",
                  window->desc, below_this_one->desc);
    }
}

/**
 * meta_window_get_user_time:
 * @window: a #MetaWindow
 *
 * The user time represents a timestamp for the last time the user
 * interacted with this window.  Note this property is only available
 * for non-override-redirect windows.
 *
 * The property is set by Mutter initially upon window creation,
 * and updated thereafter on input events (key and button presses) seen by Mutter,
 * client updates to the _NET_WM_USER_TIME property (if later than the current time)
 * and when focusing the window.
 *
 * Returns: The last time the user interacted with this window.
 */
guint32
meta_window_get_user_time (MetaWindow *window)
{
  return window->net_wm_user_time;
}

void
meta_window_set_user_time (MetaWindow *window,
                           guint32     timestamp)
{
  /* FIXME: If Soeren's suggestion in bug 151984 is implemented, it will allow
   * us to sanity check the timestamp here and ensure it doesn't correspond to
   * a future time.
   */

  g_return_if_fail (!window->override_redirect);

  /* Only update the time if this timestamp is newer... */
  if (window->net_wm_user_time_set &&
      XSERVER_TIME_IS_BEFORE (timestamp, window->net_wm_user_time))
    {
      meta_topic (META_DEBUG_STARTUP,
                  "Window %s _NET_WM_USER_TIME not updated to %u, because it "
                  "is less than %u\n",
                  window->desc, timestamp, window->net_wm_user_time);
    }
  else
    {
      meta_topic (META_DEBUG_STARTUP,
                  "Window %s has _NET_WM_USER_TIME of %u\n",
                  window->desc, timestamp);
      window->net_wm_user_time_set = TRUE;
      window->net_wm_user_time = timestamp;
      if (XSERVER_TIME_IS_BEFORE (window->display->last_user_time, timestamp))
        window->display->last_user_time = timestamp;

      /* If this is a terminal, user interaction with it means the user likely
       * doesn't want to have focus transferred for now due to new windows.
       */
      if (meta_prefs_get_focus_new_windows () == G_DESKTOP_FOCUS_NEW_WINDOWS_STRICT &&
          window_is_terminal (window))
        window->display->allow_terminal_deactivation = FALSE;
    }

  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_USER_TIME]);
}

/**
 * meta_window_get_stable_sequence:
 * @window: A #MetaWindow
 *
 * The stable sequence number is a monotonicially increasing
 * unique integer assigned to each #MetaWindow upon creation.
 *
 * This number can be useful for sorting windows in a stable
 * fashion.
 *
 * Returns: Internal sequence number for this window
 */
guint32
meta_window_get_stable_sequence (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), 0);

  return window->stable_sequence;
}

/* Sets the demands_attention hint on a window, but only
 * if it's at least partially obscured (see #305882).
 */
void
meta_window_set_demands_attention (MetaWindow *window)
{
  MetaRectangle candidate_rect, other_rect;
  GList *stack = window->screen->stack->sorted;
  MetaWindow *other_window;
  gboolean obscured = FALSE;

  MetaWorkspace *workspace = window->screen->active_workspace;

  if (window->wm_state_demands_attention)
    return;

  if (!meta_window_located_on_workspace (window, workspace))
    {
      /* windows on other workspaces are necessarily obscured */
      obscured = TRUE;
    }
  else if (window->minimized)
    {
      obscured = TRUE;
    }
  else
    {
      meta_window_get_frame_rect (window, &candidate_rect);

      /* The stack is sorted with the top windows first. */

      while (stack != NULL && stack->data != window)
        {
          other_window = stack->data;
          stack = stack->next;

          if (meta_window_located_on_workspace (other_window, workspace))
            {
              meta_window_get_frame_rect (other_window, &other_rect);

              if (meta_rectangle_overlap (&candidate_rect, &other_rect))
                {
                  obscured = TRUE;
                  break;
                }
            }
        }
    }

  if (obscured)
    {
      meta_topic (META_DEBUG_WINDOW_OPS,
                  "Marking %s as needing attention\n",
                  window->desc);

      window->wm_state_demands_attention = TRUE;
      set_net_wm_state (window);
      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_DEMANDS_ATTENTION]);
      g_signal_emit_by_name (window->display, "window-demands-attention",
                             window);
    }
  else
    {
      /* If the window's in full view, there's no point setting the flag. */

      meta_topic (META_DEBUG_WINDOW_OPS,
                 "Not marking %s as needing attention because "
                 "it's in full view\n",
                 window->desc);
    }
}

void
meta_window_unset_demands_attention (MetaWindow *window)
{
  meta_topic (META_DEBUG_WINDOW_OPS,
      "Marking %s as not needing attention\n", window->desc);

  if (window->wm_state_demands_attention)
    {
      window->wm_state_demands_attention = FALSE;
      set_net_wm_state (window);
      g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_DEMANDS_ATTENTION]);
    }
}

/**
 * meta_window_get_frame: (skip)
 * @window: a #MetaWindow
 *
 */
MetaFrame *
meta_window_get_frame (MetaWindow *window)
{
  return window->frame;
}

/**
 * meta_window_appears_focused:
 * @window: a #MetaWindow
 *
 * Determines if the window should be drawn with a focused appearance. This is
 * true for focused windows but also true for windows with a focused modal
 * dialog attached.
 *
 * Return value: %TRUE if the window should be drawn with a focused frame
 */
gboolean
meta_window_appears_focused (MetaWindow *window)
{
  return window->has_focus || (window->attached_focus_window != NULL);
}

gboolean
meta_window_has_focus (MetaWindow *window)
{
  return window->has_focus;
}

gboolean
meta_window_is_shaded (MetaWindow *window)
{
  return window->shaded;
}

/**
 * meta_window_is_override_redirect:
 * @window: A #MetaWindow
 *
 * Returns: %TRUE if this window isn't managed by mutter; it will
 * control its own positioning and mutter won't draw decorations
 * among other things.  In X terminology this is "override redirect".
 */
gboolean
meta_window_is_override_redirect (MetaWindow *window)
{
  return window->override_redirect;
}

/**
 * meta_window_is_skip_taskbar:
 * @window: A #MetaWindow
 *
 * Gets whether this window should be ignored by task lists.
 *
 * Return value: %TRUE if the skip bar hint is set.
 */
gboolean
meta_window_is_skip_taskbar (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), FALSE);

  return window->skip_taskbar;
}

/**
 * meta_window_get_screen:
 * @window: a #MetaWindow
 *
 * Gets the #MetaScreen that the window is on.
 *
 * Return value: (transfer none): the #MetaScreen for the window
 */
MetaScreen *
meta_window_get_screen (MetaWindow *window)
{
  return window->screen;
}

/**
 * meta_window_get_display:
 * @window: A #MetaWindow
 *
 * Returns: (transfer none): The display for @window
 */
MetaDisplay *
meta_window_get_display (MetaWindow *window)
{
  return window->display;
}

/**
 * meta_window_get_xwindow: (skip)
 * @window: a #MetaWindow
 *
 */
Window
meta_window_get_xwindow (MetaWindow *window)
{
  return window->xwindow;
}

MetaWindowType
meta_window_get_window_type (MetaWindow *window)
{
  return window->type;
}

/**
 * meta_window_get_workspace:
 * @window: a #MetaWindow
 *
 * Gets the #MetaWorkspace that the window is currently displayed on.
 * If the window is on all workspaces, returns the currently active
 * workspace.
 *
 * Return value: (transfer none): the #MetaWorkspace for the window
 */
MetaWorkspace *
meta_window_get_workspace (MetaWindow *window)
{
  if (window->on_all_workspaces)
    return window->screen->active_workspace;
  else
    return window->workspace;
}

gboolean
meta_window_is_on_all_workspaces (MetaWindow *window)
{
  return window->on_all_workspaces;
}

gboolean
meta_window_is_hidden (MetaWindow *window)
{
  return window->hidden;
}

const char *
meta_window_get_description (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->desc;
}

/**
 * meta_window_get_wm_class:
 * @window: a #MetaWindow
 *
 * Return the current value of the name part of WM_CLASS X property.
 */
const char *
meta_window_get_wm_class (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->res_class;
}

/**
 * meta_window_get_wm_class_instance:
 * @window: a #MetaWindow
 *
 * Return the current value of the instance part of WM_CLASS X property.
 */
const char *
meta_window_get_wm_class_instance (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->res_name;
}

/**
 * meta_window_get_gtk_theme_variant:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the theme variant or %NULL
 **/
const char *
meta_window_get_gtk_theme_variant (MetaWindow *window)
{
  return window->gtk_theme_variant;
}

/**
 * meta_window_get_gtk_application_id:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the application ID
 **/
const char *
meta_window_get_gtk_application_id (MetaWindow *window)
{
  return window->gtk_application_id;
}

/**
 * meta_window_get_gtk_unique_bus_name:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the unique name
 **/
const char *
meta_window_get_gtk_unique_bus_name (MetaWindow *window)
{
  return window->gtk_unique_bus_name;
}

/**
 * meta_window_get_flatpak_appid:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the flatpak appid or %NULL
 **/
const char *
meta_window_get_flatpak_appid (MetaWindow *window)
{
    return window->flatpak_appid;
}

/**
 * meta_window_get_gtk_application_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_application_object_path (MetaWindow *window)
{
  return window->gtk_application_object_path;
}

/**
 * meta_window_get_gtk_window_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_window_object_path (MetaWindow *window)
{
  return window->gtk_window_object_path;
}

/**
 * meta_window_get_gtk_app_menu_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_app_menu_object_path (MetaWindow *window)
{
  return window->gtk_app_menu_object_path;
}

/**
 * meta_window_get_gtk_menubar_object_path:
 * @window: a #MetaWindow
 *
 * Return value: (transfer none): the object path
 **/
const char *
meta_window_get_gtk_menubar_object_path (MetaWindow *window)
{
  return window->gtk_menubar_object_path;
}

/**
 * meta_window_get_compositor_private:
 * @window: a #MetaWindow
 *
 * Gets the compositor's wrapper object for @window.
 *
 * Return value: (transfer none): the wrapper object.
 **/
GObject *
meta_window_get_compositor_private (MetaWindow *window)
{
  if (!window)
    return NULL;
  return window->compositor_private;
}

void
meta_window_set_compositor_private (MetaWindow *window, GObject *priv)
{
  if (!window)
    return;
  window->compositor_private = priv;
}

const char *
meta_window_get_role (MetaWindow *window)
{
  if (!window)
    return NULL;

  return window->role;
}

/**
 * meta_window_get_title:
 * @window: a #MetaWindow
 *
 * Returns: the current title of the window.
 */
const char *
meta_window_get_title (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->title;
}

MetaStackLayer
meta_window_get_layer (MetaWindow *window)
{
  return window->layer;
}

/**
 * meta_window_get_transient_for:
 * @window: a #MetaWindow
 *
 * Returns the #MetaWindow for the window that is pointed to by the
 * WM_TRANSIENT_FOR hint on this window (see XGetTransientForHint()
 * or XSetTransientForHint()). Metacity keeps transient windows above their
 * parents. A typical usage of this hint is for a dialog that wants to stay
 * above its associated window.
 *
 * Return value: (transfer none): the window this window is transient for, or
 * %NULL if the WM_TRANSIENT_FOR hint is unset or does not point to a toplevel
 * window that Metacity knows about.
 */
MetaWindow *
meta_window_get_transient_for (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  if (window->transient_for)
    return window->transient_for;
  else if (window->xtransient_for)
    return meta_display_lookup_x_window (window->display,
                                         window->xtransient_for);
  else
    return NULL;
}

/**
 * meta_window_get_pid:
 * @window: a #MetaWindow
 *
 * Returns pid of the process that created this window, if known (obtained from
 * the _NET_WM_PID property).
 *
 * Return value: the pid, or -1 if not known.
 */
int
meta_window_get_pid (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), -1);

  return window->net_wm_pid;
}

/**
 * meta_window_get_client_machine:
 * @window: a #MetaWindow
 *
 * Returns name of the client machine from which this windows was created,
 * if known (obtained from the WM_CLIENT_MACHINE property).
 *
 * Return value: (transfer none): the machine name, or NULL; the string is
 * owned by the window manager and should not be freed or modified by the
 * caller.
 */
const char *
meta_window_get_client_machine (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->wm_client_machine;
}

/**
 * meta_window_is_remote:
 * @window: a #MetaWindow
 *
 * Returns: %TRUE if this window originates from a host
 * different from the one running mutter.
 */
gboolean
meta_window_is_remote (MetaWindow *window)
{
  return window->is_remote;
}

/**
 * meta_window_get_mutter_hints:
 * @window: a #MetaWindow
 *
 * Gets the current value of the _MUTTER_HINTS property.
 *
 * The purpose of the hints is to allow fine-tuning of the Window Manager and
 * Compositor behaviour on per-window basis, and is intended primarily for
 * hints that are plugin-specific.
 *
 * The property is a list of colon-separated key=value pairs. The key names for
 * any plugin-specific hints must be suitably namespaced to allow for shared
 * use; 'mutter-' key prefix is reserved for internal use, and must not be used
 * by plugins.
 *
 * Return value: (transfer none): the _MUTTER_HINTS string, or %NULL if no hints
 * are set.
 */
const char *
meta_window_get_mutter_hints (MetaWindow *window)
{
  g_return_val_if_fail (META_IS_WINDOW (window), NULL);

  return window->mutter_hints;
}

/**
 * meta_window_get_frame_type:
 * @window: a #MetaWindow
 *
 * Gets the type of window decorations that should be used for this window.
 *
 * Return value: the frame type
 */
MetaFrameType
meta_window_get_frame_type (MetaWindow *window)
{
  MetaFrameType base_type = META_FRAME_TYPE_LAST;

  switch (window->type)
    {
    case META_WINDOW_NORMAL:
      base_type = META_FRAME_TYPE_NORMAL;
      break;

    case META_WINDOW_DIALOG:
      base_type = META_FRAME_TYPE_DIALOG;
      break;

    case META_WINDOW_MODAL_DIALOG:
      if (meta_window_is_attached_dialog (window))
        base_type = META_FRAME_TYPE_ATTACHED;
      else
        base_type = META_FRAME_TYPE_MODAL_DIALOG;
      break;

    case META_WINDOW_MENU:
      base_type = META_FRAME_TYPE_MENU;
      break;

    case META_WINDOW_UTILITY:
      base_type = META_FRAME_TYPE_UTILITY;
      break;

    case META_WINDOW_DESKTOP:
    case META_WINDOW_DOCK:
    case META_WINDOW_TOOLBAR:
    case META_WINDOW_SPLASHSCREEN:
    case META_WINDOW_DROPDOWN_MENU:
    case META_WINDOW_POPUP_MENU:
    case META_WINDOW_TOOLTIP:
    case META_WINDOW_NOTIFICATION:
    case META_WINDOW_COMBO:
    case META_WINDOW_DND:
    case META_WINDOW_OVERRIDE_OTHER:
      /* No frame */
      base_type = META_FRAME_TYPE_LAST;
      break;
    }

  if (base_type == META_FRAME_TYPE_LAST)
    {
      /* can't add border if undecorated */
      return META_FRAME_TYPE_LAST;
    }
  else if (window->border_only ||
           (window->hide_titlebar_when_maximized && META_WINDOW_MAXIMIZED (window)) ||
           (window->hide_titlebar_when_maximized && META_WINDOW_TILED_SIDE_BY_SIDE (window)))
    {
      /* override base frame type */
      return META_FRAME_TYPE_BORDER;
    }
  else
    {
      return base_type;
    }
}

/**
 * meta_window_get_frame_bounds:
 * @window: a #MetaWindow
 *
 * Gets a region representing the outer bounds of the window's frame.
 *
 * Return value: (transfer none) (nullable): a #cairo_region_t
 *  holding the outer bounds of the window, or %NULL if the window
 *  doesn't have a frame.
 */
cairo_region_t *
meta_window_get_frame_bounds (MetaWindow *window)
{
  if (!window->frame_bounds)
    {
      if (window->frame)
        window->frame_bounds = meta_frame_get_frame_bounds (window->frame);
    }

  return window->frame_bounds;
}

/**
 * meta_window_is_attached_dialog:
 * @window: a #MetaWindow
 *
 * Tests if @window is should be attached to its parent window.
 * (If the "attach_modal_dialogs" option is not enabled, this will
 * always return %FALSE.)
 *
 * Return value: whether @window should be attached to its parent
 */
gboolean
meta_window_is_attached_dialog (MetaWindow *window)
{
  return window->attached;
}

/**
 * meta_window_get_tile_match:
 * @window: a #MetaWindow
 *
 * Returns the matching tiled window on the same monitor as @window. This is
 * the topmost tiled window in a complementary tile mode that is:
 *
 *  - on the same monitor;
 *  - on the same workspace;
 *  - spanning the remaining monitor width;
 *  - there is no 3rd window stacked between both tiled windows that's
 *    partially visible in the common edge.
 *
 * Return value: (transfer none) (nullable): the matching tiled window or
 * %NULL if it doesn't exist.
 */
MetaWindow *
meta_window_get_tile_match (MetaWindow *window)
{
  return window->tile_match;
}

/**
 * meta_window_get_tile_counterpart:
 * @window: a #MetaWindow
 *
 * Returns the matching tiled window on the same monitor as @window. This is
 * the least constrained version of above.
 * Return value: (transfer none) (nullable): the matching tiled window or
 * %NULL if it doesn't exist.
 */
MetaWindow *
meta_window_get_tile_counterpart (MetaWindow *window)
{
  return window->tile_counterpart;
}

void
meta_window_compute_tile_counterpart (MetaWindow *window)
{
  MetaWindow *match;
  MetaStack *stack;
  MetaTileMode match_tile_mode = META_TILE_NONE;

  if (window->tile_counterpart)
    window->tile_counterpart->tile_counterpart = NULL;
  window->tile_counterpart = NULL;

  if (META_WINDOW_TILED_LEFT (window))
    match_tile_mode = META_TILE_RIGHT;
  else if (META_WINDOW_TILED_RIGHT (window))
    match_tile_mode = META_TILE_LEFT;
  else
    return;

  stack = window->screen->stack;

  for (match = meta_stack_get_top (stack);
       match;
       match = meta_stack_get_below (stack, match, FALSE))
    {
      if (//!match->shaded && !match->minimized &&
          match->tile_mode == match_tile_mode &&
          match->monitor == window->monitor &&
          meta_window_get_workspace (match) == meta_window_get_workspace (window))
        {
          //NOTE: this may unstable if we can't assume that only two tiled windows 
          //exists on the same monitor.
          window->tile_counterpart = match;
          match->tile_counterpart = window;
          break;
        }
    }
}

void
meta_window_compute_tile_match (MetaWindow *window)
{
  MetaWindow *match;
  MetaStack *stack;
  MetaTileMode match_tile_mode = META_TILE_NONE;

  window->tile_match = NULL;

  if (window->shaded || window->minimized)
    return;

  if (META_WINDOW_TILED_LEFT (window))
    match_tile_mode = META_TILE_RIGHT;
  else if (META_WINDOW_TILED_RIGHT (window))
    match_tile_mode = META_TILE_LEFT;
  else
    return;

  stack = window->screen->stack;

  for (match = meta_stack_get_top (stack);
       match;
       match = meta_stack_get_below (stack, match, FALSE))
    {
      if (!match->shaded &&
          !match->minimized &&
          match->tile_mode == match_tile_mode &&
          match->monitor == window->monitor &&
          meta_window_get_workspace (match) == meta_window_get_workspace (window))
        break;
    }

  if (match)
    {
      MetaWindow *above, *bottommost, *topmost;
      MetaRectangle above_rect, bottommost_rect, topmost_rect;

      if (meta_stack_windows_cmp (window->screen->stack, match, window) > 0)
        {
          topmost = match;
          bottommost = window;
        }
      else
        {
          topmost = window;
          bottommost = match;
        }

      meta_window_get_frame_rect (bottommost, &bottommost_rect);
      meta_window_get_frame_rect (topmost, &topmost_rect);
      /*
       * If there's a window stacked in between which is partially visible
       * behind the topmost tile we don't consider the tiles to match.
       */
      for (above = meta_stack_get_above (stack, bottommost, FALSE);
           above && above != topmost;
           above = meta_stack_get_above (stack, above, FALSE))
        {
          if (above->minimized ||
              above->monitor != window->monitor ||
              meta_window_get_workspace (above) != meta_window_get_workspace (window))
            continue;

          meta_window_get_frame_rect (above, &above_rect);

          if (meta_rectangle_overlap (&above_rect, &bottommost_rect) &&
              meta_rectangle_overlap (&above_rect, &topmost_rect))
            return;
        }

      window->tile_match = match;
    }
}

void
meta_window_set_title (MetaWindow *window,
                       const char *title)
{
  g_free (window->title);
  window->title = g_strdup (title);

  if (window->frame)
    meta_frame_update_title (window->frame);

  meta_window_update_desc (window);

  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_TITLE]);
}

void 
meta_window_set_flatpak_appid (MetaWindow *window,
                               const char *id)
{
    g_free (window->flatpak_appid);
    window->flatpak_appid = g_strdup (id);

    g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_FLATPAK_APPID]);
}

void
meta_window_set_wm_class (MetaWindow *window,
                          const char *wm_class,
                          const char *wm_instance)
{
  g_free (window->res_class);
  g_free (window->res_name);

  window->res_name = g_strdup (wm_instance);
  window->res_class = g_strdup (wm_class);

  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_WM_CLASS]);
}

void
meta_window_set_gtk_dbus_properties (MetaWindow *window,
                                     const char *application_id,
                                     const char *unique_bus_name,
                                     const char *appmenu_path,
                                     const char *menubar_path,
                                     const char *application_object_path,
                                     const char *window_object_path)
{
  g_object_freeze_notify (G_OBJECT (window));

  g_free (window->gtk_application_id);
  window->gtk_application_id = g_strdup (application_id);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_APPLICATION_ID]);

  g_free (window->gtk_unique_bus_name);
  window->gtk_unique_bus_name = g_strdup (unique_bus_name);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_UNIQUE_BUS_NAME]);

  g_free (window->gtk_app_menu_object_path);
  window->gtk_app_menu_object_path = g_strdup (appmenu_path);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_APP_MENU_OBJECT_PATH]);

  g_free (window->gtk_menubar_object_path);
  window->gtk_menubar_object_path = g_strdup (menubar_path);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_MENUBAR_OBJECT_PATH]);

  g_free (window->gtk_application_object_path);
  window->gtk_application_object_path = g_strdup (application_object_path);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_APPLICATION_OBJECT_PATH]);

  g_free (window->gtk_window_object_path);
  window->gtk_window_object_path = g_strdup (window_object_path);
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_GTK_WINDOW_OBJECT_PATH]);

  g_object_thaw_notify (G_OBJECT (window));
}

static gboolean
check_transient_for_loop (MetaWindow *window,
                          MetaWindow *parent)
{
  while (parent)
    {
      if (parent->transient_for == window)
          return TRUE;
      parent = parent->transient_for;
    }

  return FALSE;
}

void
meta_window_set_transient_for (MetaWindow *window,
                               MetaWindow *parent)
{
  if (check_transient_for_loop (window, parent))
    {
      meta_warning ("Setting %s transient for %s would create a loop.\n",
                    window->desc, parent->desc);
      return;
    }

  if (meta_window_appears_focused (window) && window->transient_for != NULL)
    meta_window_propagate_focus_appearance (window, FALSE);

  /* may now be a dialog */
  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
    meta_window_x11_recalc_window_type (window);

  if (!window->constructing)
    {
      /* If the window attaches, detaches, or changes attached
       * parents, we need to destroy the MetaWindow and let a new one
       * be created (which happens as a side effect of
       * meta_window_unmanage()). The condition below is correct
       * because we know window->transient_for has changed.
       */
      if (window->attached || meta_window_should_attach_to_parent (window))
        {
          guint32 timestamp;

          timestamp = meta_display_get_current_time_roundtrip (window->display);
          meta_window_unmanage (window, timestamp);
          return;
        }
    }

  /* We know this won't create a reference cycle because we check for loops */
  g_clear_object (&window->transient_for);
  window->transient_for = parent ? g_object_ref (parent) : NULL;

  /* update stacking constraints */
  if (!window->override_redirect)
    meta_stack_update_transient (window->screen->stack, window);

  /* possibly change its group. We treat being a window's transient as
   * equivalent to making it your group leader, to work around shortcomings
   * in programs such as xmms-- see #328211.
   */
  if (window->xtransient_for != None &&
      window->xgroup_leader != None &&
      window->xtransient_for != window->xgroup_leader)
    meta_window_group_leader_changed (window);

  if (!window->constructing && !window->override_redirect)
    meta_window_queue (window, META_QUEUE_MOVE_RESIZE | META_QUEUE_CALC_SHOWING);

  if (meta_window_appears_focused (window) && window->transient_for != NULL)
    meta_window_propagate_focus_appearance (window, TRUE);
}

void
meta_window_set_opacity (MetaWindow *window,
                         guint8      opacity)
{
  window->opacity = opacity;

  meta_compositor_window_opacity_changed (window->display->compositor, window);
}

static void
reset_ignored_crossing_serials (MetaDisplay *display)
{
  int i;

  i = 0;
  while (i < N_IGNORED_CROSSING_SERIALS)
    {
      display->ignored_crossing_serials[i] = 0;
      ++i;
    }
}

typedef struct
{
  MetaWindow *window;
  int pointer_x;
  int pointer_y;
} MetaFocusData;

static void
mouse_mode_focus (MetaWindow  *window,
                  guint32      timestamp)
{
  MetaDisplay *display = window->display;

  if (window->type != META_WINDOW_DESKTOP)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing %s at time %u.\n", window->desc, timestamp);

      meta_window_focus (window, timestamp);

      if (meta_prefs_get_auto_raise ())
        meta_display_queue_autoraise_callback (display, window);
      else
        meta_topic (META_DEBUG_FOCUS, "Auto raise is disabled\n");
    }
  else
    {
      /* In mouse focus mode, we defocus when the mouse *enters*
       * the DESKTOP window, instead of defocusing on LeaveNotify.
       * This is because having the mouse enter override-redirect
       * child windows unfortunately causes LeaveNotify events that
       * we can't distinguish from the mouse actually leaving the
       * toplevel window as we expect.  But, since we filter out
       * EnterNotify events on override-redirect windows, this
       * alternative mechanism works great.
       */
      if (meta_prefs_get_focus_mode() == G_DESKTOP_FOCUS_MODE_MOUSE &&
          display->focus_window != NULL)
        {
          meta_topic (META_DEBUG_FOCUS,
                      "Unsetting focus from %s due to mouse entering "
                      "the DESKTOP window\n",
                      display->focus_window->desc);
          meta_display_focus_the_no_focus_window (display,
                                                  window->screen,
                                                  timestamp);
        }
    }
}

static gboolean
window_has_pointer_wayland (MetaWindow *window)
{
  ClutterDeviceManager *dm;
  ClutterInputDevice *dev;
  ClutterActor *pointer_actor, *window_actor;

  dm = clutter_device_manager_get_default ();
  dev = clutter_device_manager_get_core_device (dm, CLUTTER_POINTER_DEVICE);
  pointer_actor = clutter_input_device_get_pointer_actor (dev);
  window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));

  return pointer_actor && clutter_actor_contains (window_actor, pointer_actor);
}

static gboolean
window_has_pointer_x11 (MetaWindow *window)
{
  MetaDisplay *display = window->display;
  MetaScreen *screen = window->screen;
  Window root, child;
  double root_x, root_y, x, y;
  XIButtonState buttons;
  XIModifierState mods;
  XIGroupState group;

  meta_error_trap_push (display);
  XIQueryPointer (display->xdisplay,
                  META_VIRTUAL_CORE_POINTER_ID,
                  screen->xroot,
                  &root, &child,
                  &root_x, &root_y, &x, &y,
                  &buttons, &mods, &group);
  meta_error_trap_pop (display);
  free (buttons.mask);

  return meta_display_lookup_x_window (display, child) == window;
}

gboolean
meta_window_has_pointer (MetaWindow *window)
{
  if (meta_is_wayland_compositor ())
    return window_has_pointer_wayland (window);
  else
    return window_has_pointer_x11 (window);
}

static gboolean
window_focus_on_pointer_rest_callback (gpointer data)
{
  MetaFocusData *focus_data = data;
  MetaWindow *window = focus_data->window;
  MetaDisplay *display = window->display;
  MetaScreen *screen = window->screen;
  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
  int root_x, root_y;
  guint32 timestamp;

  if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK)
    goto out;

  meta_cursor_tracker_get_pointer (tracker, &root_x, &root_y, NULL);

  if (root_x != focus_data->pointer_x ||
      root_y != focus_data->pointer_y)
    {
      focus_data->pointer_x = root_x;
      focus_data->pointer_y = root_y;
      return G_SOURCE_CONTINUE;
    }

  if (!meta_window_has_pointer (window))
    goto out;

  timestamp = meta_display_get_current_time_roundtrip (display);
  mouse_mode_focus (window, timestamp);

 out:
  display->focus_timeout_id = 0;
  return G_SOURCE_REMOVE;
}

/* The interval, in milliseconds, we use in focus-follows-mouse
 * mode to check whether the pointer has stopped moving after a
 * crossing event.
 */
#define FOCUS_TIMEOUT_DELAY 25

static void
queue_focus_callback (MetaDisplay *display,
                      MetaWindow  *window,
                      int          pointer_x,
                      int          pointer_y)
{
  MetaFocusData *focus_data;

  focus_data = g_new (MetaFocusData, 1);
  focus_data->window = window;
  focus_data->pointer_x = pointer_x;
  focus_data->pointer_y = pointer_y;

  if (display->focus_timeout_id != 0)
    g_source_remove (display->focus_timeout_id);

  display->focus_timeout_id =
    g_timeout_add_full (G_PRIORITY_DEFAULT,
                        FOCUS_TIMEOUT_DELAY,
                        window_focus_on_pointer_rest_callback,
                        focus_data,
                        g_free);
  g_source_set_name_by_id (display->focus_timeout_id,
                           "[mutter] window_focus_on_pointer_rest_callback");
}

void
meta_window_handle_enter (MetaWindow  *window,
                          guint32      timestamp,
                          guint        root_x,
                          guint        root_y)
{
  MetaDisplay *display = window->display;

  switch (meta_prefs_get_focus_mode ())
    {
    case G_DESKTOP_FOCUS_MODE_SLOPPY:
    case G_DESKTOP_FOCUS_MODE_MOUSE:
      display->mouse_mode = TRUE;
      if (window->type != META_WINDOW_DOCK)
        {
          if (meta_prefs_get_focus_change_on_pointer_rest())
            queue_focus_callback (display, window, root_x, root_y);
          else
            mouse_mode_focus (window, timestamp);

          /* stop ignoring stuff */
          reset_ignored_crossing_serials (display);
        }
      break;
    case G_DESKTOP_FOCUS_MODE_CLICK:
      break;
    }

  if (window->type == META_WINDOW_DOCK)
    meta_window_raise (window);
}

void
meta_window_handle_leave (MetaWindow *window)
{
  if (window->type == META_WINDOW_DOCK && !window->has_focus)
    meta_window_lower (window);
}

void
meta_window_handle_ungrabbed_event (MetaWindow         *window,
                                    const ClutterEvent *event)
{
  MetaDisplay *display = window->display;
  gboolean unmodified;
  gboolean is_window_grab;
  ClutterModifierType grab_mods, event_mods;
  gfloat x, y;
  guint button;

  if (window->frame && meta_ui_frame_handle_event (window->frame->ui_frame, event))
    return;

  if (event->type != CLUTTER_BUTTON_PRESS &&
      event->type != CLUTTER_TOUCH_BEGIN)
    return;

  if (event->type == CLUTTER_TOUCH_BEGIN)
    {
      ClutterEventSequence *sequence;

      button = 1;
      sequence = clutter_event_get_event_sequence (event);
      if (!meta_display_is_pointer_emulating_sequence (window->display, sequence))
        return;
    }
  else
    button = clutter_event_get_button (event);

  if (display->grab_op != META_GRAB_OP_NONE)
    return;

  /* Some windows might not ask for input, in which case we might be here
   * because we selected for ButtonPress on the root window. In that case,
   * we have to take special care not to act for an override-redirect window.
   */
  if (window->override_redirect)
    return;

  /* Don't focus panels--they must explicitly request focus.
   * See bug 160470
   */
  if (window->type != META_WINDOW_DOCK)
    {
      meta_topic (META_DEBUG_FOCUS,
                  "Focusing %s due to button %u press (display.c)\n",
                  window->desc, button);
      meta_window_focus (window, event->any.time);
    }
  else
    /* However, do allow terminals to lose focus due to new
     * window mappings after the user clicks on a panel.
     */
    display->allow_terminal_deactivation = TRUE;

  /* We have three passive button grabs:
   * - on any button, without modifiers => focuses and maybe raises the window
   * - on resize button, with modifiers => start an interactive resizing
   *   (normally <Super>middle)
   * - on move button, with modifiers => start an interactive move
   *   (normally <Super>left)
   * - on menu button, with modifiers => show the window menu
   *   (normally <Super>right)
   *
   * We may get here because we actually have a button
   * grab on the window, or because we're a wayland
   * compositor and thus we see all the events, so we
   * need to check if the event is interesting.
   * We want an event that is not modified for a window.
   *
   * We may have other events on the window, for example
   * a click on a frame button, but that's not for us to
   * care about. Just let the event through.
   */

  grab_mods = meta_display_get_window_grab_modifiers (display);
  event_mods = clutter_event_get_state (event);
  unmodified = (event_mods & grab_mods) == 0;
  is_window_grab = (event_mods & grab_mods) == grab_mods;

  clutter_event_get_coords (event, &x, &y);

  if (unmodified)
    {
      if (meta_prefs_get_raise_on_click ())
        meta_window_raise (window);
      else
        meta_topic (META_DEBUG_FOCUS,
                    "Not raising window on click due to don't-raise-on-click option\n");
    }
  else if (is_window_grab && (int) button == meta_prefs_get_mouse_button_resize ())
    {
      if (window->has_resize_func)
        {
          gboolean north, south;
          gboolean west, east;
          MetaRectangle frame_rect;
          MetaGrabOp op = META_GRAB_OP_WINDOW_BASE;

          meta_window_get_frame_rect (window, &frame_rect);

          west = x < (frame_rect.x + 1 * frame_rect.width / 3);
          east = x > (frame_rect.x + 2 * frame_rect.width / 3);
          north = y < (frame_rect.y + 1 * frame_rect.height / 3);
          south = y > (frame_rect.y + 2 * frame_rect.height / 3);

          if (west)
            op |= META_GRAB_OP_WINDOW_DIR_WEST;
          if (east)
            op |= META_GRAB_OP_WINDOW_DIR_EAST;
          if (north)
            op |= META_GRAB_OP_WINDOW_DIR_NORTH;
          if (south)
            op |= META_GRAB_OP_WINDOW_DIR_SOUTH;

          if (op != META_GRAB_OP_WINDOW_BASE)
            meta_display_begin_grab_op (display,
                                        window->screen,
                                        window,
                                        op,
                                        TRUE,
                                        FALSE,
                                        button,
                                        0,
                                        event->any.time,
                                        x, y);
        }
    }
  else if (is_window_grab && (int) button == meta_prefs_get_mouse_button_menu ())
    {
      if (meta_prefs_get_raise_on_click ())
        meta_window_raise (window);
      meta_window_show_menu (window,
                             META_WINDOW_MENU_WM,
                             x, y);
    }
  else if (is_window_grab && (int) button == 1)
    {
      if (window->has_move_func)
        {
          meta_display_begin_grab_op (display,
                                      window->screen,
                                      window,
                                      META_GRAB_OP_MOVING,
                                      TRUE,
                                      FALSE,
                                      button,
                                      0,
                                      event->any.time,
                                      x, y);
        }
    }
}

gboolean
meta_window_can_maximize (MetaWindow *window)
{
  return window->has_maximize_func;
}

gboolean
meta_window_can_minimize (MetaWindow *window)
{
  return window->has_minimize_func;
}

gboolean
meta_window_can_shade (MetaWindow *window)
{
  return window->has_shade_func;
}

gboolean
meta_window_can_close (MetaWindow *window)
{
  return window->has_close_func;
}

gboolean
meta_window_is_always_on_all_workspaces (MetaWindow *window)
{
  return window->always_sticky;
}

gboolean
meta_window_is_above (MetaWindow *window)
{
  return window->wm_state_above;
}

gboolean
meta_window_allows_move (MetaWindow *window)
{
  return META_WINDOW_ALLOWS_MOVE (window);
}

gboolean
meta_window_allows_resize (MetaWindow *window)
{
  return META_WINDOW_ALLOWS_RESIZE (window);
}

void
meta_window_set_urgent (MetaWindow *window,
                        gboolean    urgent)
{
  if (window->urgent == urgent)
    return;

  window->urgent = urgent;
  g_object_notify_by_pspec (G_OBJECT (window), obj_props[PROP_URGENT]);

  if (urgent)
    g_signal_emit_by_name (window->display, "window-marked-urgent", window);
}

void
meta_window_grab_op_began (MetaWindow *window,
                           MetaGrabOp  op)
{
  META_WINDOW_GET_CLASS (window)->grab_op_began (window, op);
}

void
meta_window_grab_op_ended (MetaWindow *window,
                           MetaGrabOp  op)
{
  META_WINDOW_GET_CLASS (window)->grab_op_ended (window, op);
}

void
meta_window_emit_size_changed (MetaWindow *window)
{
  g_signal_emit (window, window_signals[SIZE_CHANGED], 0);
}

void
meta_window_tile_by_side (MetaWindow *window, MetaTileSide side)
{
    switch (side) {
        case META_TILE_SIDE_LEFT:
            window->tile_mode = META_TILE_LEFT; break;
        case META_TILE_SIDE_RIGHT:
            window->tile_mode = META_TILE_RIGHT; break;
        default: return;
    }

    if (window->tile_mode != META_TILE_NONE && window->monitor)
        window->tile_monitor_number = window->monitor->number;

    if (meta_window_can_tile_side_by_side (window))
        meta_window_tile (window);
}

void
meta_window_begin_to_move (MetaWindow *window)
{
    if (meta_window_allows_move (window)) {
        guint32 timestamp = meta_display_get_current_time_roundtrip (window->display);
        meta_window_begin_grab_op (window,
                                   META_GRAB_OP_KEYBOARD_MOVING,
                                   FALSE,
                                   timestamp);
    }
}

